diff --git a/src/main/java/client/Character.java b/src/main/java/client/Character.java
index 07089d5a91..339aaac946 100644
--- a/src/main/java/client/Character.java
+++ b/src/main/java/client/Character.java
@@ -37,6 +37,7 @@ import config.YamlConfig;
 import constants.game.ExpTable;
 import constants.game.GameConstants;
 import constants.id.ItemId;
+import constants.id.MobId;
 import constants.inventory.ItemConstants;
 import constants.skills.*;
 import net.packet.Packet;
@@ -7518,12 +7519,12 @@ public class Character extends AbstractCharacterObject {
     public void raiseQuestMobCount(int id) {
         // It seems nexon uses monsters that don't exist in the WZ (except string) to merge multiple mobs together for these 3 monsters.
         // We also want to run mobKilled for both since there are some quest that don't use the updated ID...
-        if (id == 1110100 || id == 1110130) {
-            raiseQuestMobCount(9101000);
-        } else if (id == 2230101 || id == 2230131) {
-            raiseQuestMobCount(9101001);
-        } else if (id == 1140100 || id == 1140130) {
-            raiseQuestMobCount(9101002);
+        if (id == MobId.GREEN_MUSHROOM || id == MobId.DEJECTED_GREEN_MUSHROOM) {
+            raiseQuestMobCount(MobId.GREEN_MUSHROOM_QUEST);
+        } else if (id == MobId.ZOMBIE_MUSHROOM || id == MobId.ANNOYED_ZOMBIE_MUSHROOM) {
+            raiseQuestMobCount(MobId.ZOMBIE_MUSHROOM_QUEST);
+        } else if (id == MobId.GHOST_STUMP || id == MobId.SMIRKING_GHOST_STUMP) {
+            raiseQuestMobCount(MobId.GHOST_STUMP_QUEST);
         }
 
         int lastQuestProcessed = 0;
diff --git a/src/main/java/client/command/commands/gm2/BombCommand.java b/src/main/java/client/command/commands/gm2/BombCommand.java
index 9ba92f3274..aa609bfefb 100644
--- a/src/main/java/client/command/commands/gm2/BombCommand.java
+++ b/src/main/java/client/command/commands/gm2/BombCommand.java
@@ -26,6 +26,7 @@ package client.command.commands.gm2;
 import client.Character;
 import client.Client;
 import client.command.Command;
+import constants.id.MobId;
 import net.server.Server;
 import server.life.LifeFactory;
 import tools.PacketCreator;
@@ -41,13 +42,13 @@ public class BombCommand extends Command {
         if (params.length > 0) {
             Character victim = c.getWorldServer().getPlayerStorage().getCharacterByName(params[0]);
             if (victim != null) {
-                victim.getMap().spawnMonsterOnGroundBelow(LifeFactory.getMonster(9300166), victim.getPosition());
+                victim.getMap().spawnMonsterOnGroundBelow(LifeFactory.getMonster(MobId.ARPQ_BOMB), victim.getPosition());
                 Server.getInstance().broadcastGMMessage(c.getWorld(), PacketCreator.serverNotice(5, player.getName() + " used !bomb on " + victim.getName()));
             } else {
                 player.message("Player '" + params[0] + "' could not be found on this world.");
             }
         } else {
-            player.getMap().spawnMonsterOnGroundBelow(LifeFactory.getMonster(9300166), player.getPosition());
+            player.getMap().spawnMonsterOnGroundBelow(LifeFactory.getMonster(MobId.ARPQ_BOMB), player.getPosition());
         }
     }
 }
diff --git a/src/main/java/client/command/commands/gm3/KillAllCommand.java b/src/main/java/client/command/commands/gm3/KillAllCommand.java
index aec2c83bab..787e48343f 100644
--- a/src/main/java/client/command/commands/gm3/KillAllCommand.java
+++ b/src/main/java/client/command/commands/gm3/KillAllCommand.java
@@ -26,6 +26,7 @@ package client.command.commands.gm3;
 import client.Character;
 import client.Client;
 import client.command.Command;
+import constants.id.MobId;
 import server.life.Monster;
 import server.maps.MapObject;
 import server.maps.MapObjectType;
@@ -47,7 +48,7 @@ public class KillAllCommand extends Command {
         int count = 0;
         for (MapObject monstermo : monsters) {
             Monster monster = (Monster) monstermo;
-            if (!monster.getStats().isFriendly() && !(monster.getId() >= 8810010 && monster.getId() <= 8810018)) {
+            if (!monster.getStats().isFriendly() && !(monster.getId() >= MobId.DEAD_HORNTAIL_MIN && monster.getId() <= MobId.HORNTAIL)) {
                 map.damageMonster(player, monster, Integer.MAX_VALUE);
                 count++;
             }
diff --git a/src/main/java/client/command/commands/gm4/CakeCommand.java b/src/main/java/client/command/commands/gm4/CakeCommand.java
index 670223cd11..3b2ba63f1a 100644
--- a/src/main/java/client/command/commands/gm4/CakeCommand.java
+++ b/src/main/java/client/command/commands/gm4/CakeCommand.java
@@ -26,6 +26,7 @@ package client.command.commands.gm4;
 import client.Character;
 import client.Client;
 import client.command.Command;
+import constants.id.MobId;
 import server.life.LifeFactory;
 import server.life.Monster;
 
@@ -37,7 +38,7 @@ public class CakeCommand extends Command {
     @Override
     public void execute(Client c, String[] params) {
         Character player = c.getPlayer();
-        Monster monster = LifeFactory.getMonster(9400606);
+        Monster monster = LifeFactory.getMonster(MobId.GIANT_CAKE);
         if (params.length == 1) {
             double mobHp = Double.parseDouble(params[0]);
             int newHp = (mobHp <= 0) ? Integer.MAX_VALUE : ((mobHp > Integer.MAX_VALUE) ? Integer.MAX_VALUE : (int) mobHp);
diff --git a/src/main/java/client/command/commands/gm4/PapCommand.java b/src/main/java/client/command/commands/gm4/PapCommand.java
index 5616014933..f0ddecc792 100644
--- a/src/main/java/client/command/commands/gm4/PapCommand.java
+++ b/src/main/java/client/command/commands/gm4/PapCommand.java
@@ -26,6 +26,7 @@ package client.command.commands.gm4;
 import client.Character;
 import client.Client;
 import client.command.Command;
+import constants.id.MobId;
 import server.life.LifeFactory;
 
 public class PapCommand extends Command {
@@ -38,6 +39,6 @@ public class PapCommand extends Command {
         Character player = c.getPlayer();
 
         // thanks Conrad for noticing mobid typo here
-        player.getMap().spawnMonsterOnGroundBelow(LifeFactory.getMonster(8500001), player.getPosition());
+        player.getMap().spawnMonsterOnGroundBelow(LifeFactory.getMonster(MobId.PAPULATUS_CLOCK), player.getPosition());
     }
 }
diff --git a/src/main/java/client/command/commands/gm4/PianusCommand.java b/src/main/java/client/command/commands/gm4/PianusCommand.java
index 4c498c6ba8..4a5d7fe739 100644
--- a/src/main/java/client/command/commands/gm4/PianusCommand.java
+++ b/src/main/java/client/command/commands/gm4/PianusCommand.java
@@ -26,6 +26,7 @@ package client.command.commands.gm4;
 import client.Character;
 import client.Client;
 import client.command.Command;
+import constants.id.MobId;
 import server.life.LifeFactory;
 
 public class PianusCommand extends Command {
@@ -36,6 +37,6 @@ public class PianusCommand extends Command {
     @Override
     public void execute(Client c, String[] params) {
         Character player = c.getPlayer();
-        player.getMap().spawnMonsterOnGroundBelow(LifeFactory.getMonster(8510000), player.getPosition());
+        player.getMap().spawnMonsterOnGroundBelow(LifeFactory.getMonster(MobId.PIANUS_R), player.getPosition());
     }
 }
diff --git a/src/main/java/client/command/commands/gm4/PinkbeanCommand.java b/src/main/java/client/command/commands/gm4/PinkbeanCommand.java
index e1bb7655e0..37cee3ae11 100644
--- a/src/main/java/client/command/commands/gm4/PinkbeanCommand.java
+++ b/src/main/java/client/command/commands/gm4/PinkbeanCommand.java
@@ -26,6 +26,7 @@ package client.command.commands.gm4;
 import client.Character;
 import client.Client;
 import client.command.Command;
+import constants.id.MobId;
 import server.life.LifeFactory;
 
 public class PinkbeanCommand extends Command {
@@ -36,7 +37,7 @@ public class PinkbeanCommand extends Command {
     @Override
     public void execute(Client c, String[] params) {
         Character player = c.getPlayer();
-        player.getMap().spawnMonsterOnGroundBelow(LifeFactory.getMonster(8820001), player.getPosition());
+        player.getMap().spawnMonsterOnGroundBelow(LifeFactory.getMonster(MobId.PINK_BEAN), player.getPosition());
 
     }
 }
diff --git a/src/main/java/client/command/commands/gm4/ZakumCommand.java b/src/main/java/client/command/commands/gm4/ZakumCommand.java
index 6d647acc08..eeea31f45f 100644
--- a/src/main/java/client/command/commands/gm4/ZakumCommand.java
+++ b/src/main/java/client/command/commands/gm4/ZakumCommand.java
@@ -26,6 +26,7 @@ package client.command.commands.gm4;
 import client.Character;
 import client.Client;
 import client.command.Command;
+import constants.id.MobId;
 import server.life.LifeFactory;
 
 public class ZakumCommand extends Command {
@@ -36,9 +37,9 @@ public class ZakumCommand extends Command {
     @Override
     public void execute(Client c, String[] params) {
         Character player = c.getPlayer();
-        player.getMap().spawnFakeMonsterOnGroundBelow(LifeFactory.getMonster(8800000), player.getPosition());
-        for (int x = 8800003; x < 8800011; x++) {
-            player.getMap().spawnMonsterOnGroundBelow(LifeFactory.getMonster(x), player.getPosition());
+        player.getMap().spawnFakeMonsterOnGroundBelow(LifeFactory.getMonster(MobId.ZAKUM_1), player.getPosition());
+        for (int mobId = MobId.ZAKUM_ARM_1; mobId <= MobId.ZAKUM_ARM_8; mobId++) {
+            player.getMap().spawnMonsterOnGroundBelow(LifeFactory.getMonster(mobId), player.getPosition());
         }
     }
 }
diff --git a/src/main/java/constants/game/GameConstants.java b/src/main/java/constants/game/GameConstants.java
index 882a2aac21..10d79c2c7d 100644
--- a/src/main/java/constants/game/GameConstants.java
+++ b/src/main/java/constants/game/GameConstants.java
@@ -584,10 +584,6 @@ public class GameConstants {
         return mapid >= 925030100 && mapid < 925040000;
     }
 
-    public static boolean isDojoBoss(int mobid) {
-        return mobid >= 9300184 && mobid < 9300216;
-    }
-
     public static boolean isDojoBossArea(int mapid) {
         return isDojo(mapid) && (((mapid / 100) % 100) % 6) > 0;
     }
diff --git a/src/main/java/constants/id/MobId.java b/src/main/java/constants/id/MobId.java
new file mode 100644
index 0000000000..3f05a2d47f
--- /dev/null
+++ b/src/main/java/constants/id/MobId.java
@@ -0,0 +1,103 @@
+package constants.id;
+
+public class MobId {
+    public static final int ARPQ_BOMB = 9300166;
+    public static final int GIANT_CAKE = 9400606;
+    public static final int TRANSPARENT_ITEM = 9300216;
+
+    public static final int GREEN_MUSHROOM = 1110100;
+    public static final int DEJECTED_GREEN_MUSHROOM = 1110130;
+    public static final int GREEN_MUSHROOM_QUEST = 9101000;
+    public static final int ZOMBIE_MUSHROOM = 2230101;
+    public static final int ANNOYED_ZOMBIE_MUSHROOM = 2230131;
+    public static final int ZOMBIE_MUSHROOM_QUEST = 9101001;
+    public static final int GHOST_STUMP = 1140100;
+    public static final int SMIRKING_GHOST_STUMP = 1140130;
+    public static final int GHOST_STUMP_QUEST = 9101002;
+
+    public static final int PAPULATUS_CLOCK = 8500001;
+    public static final int HIGH_DARKSTAR = 8500003;
+    public static final int LOW_DARKSTAR = 8500004;
+
+    public static final int PIANUS_R = 8510000;
+    public static final int BLOODY_BOOM = 8510100;
+
+    public static final int PINK_BEAN = 8820001;
+
+    public static final int ZAKUM_1 = 8800000;
+    public static final int ZAKUM_2 = 8800001;
+    public static final int ZAKUM_3 = 8800002;
+    public static final int ZAKUM_ARM_1 = 8800003;
+    public static final int ZAKUM_ARM_2 = 8800004;
+    public static final int ZAKUM_ARM_3 = 8800005;
+    public static final int ZAKUM_ARM_4 = 8800006;
+    public static final int ZAKUM_ARM_5 = 8800007;
+    public static final int ZAKUM_ARM_6 = 8800008;
+    public static final int ZAKUM_ARM_7 = 8800009;
+    public static final int ZAKUM_ARM_8 = 8800010;
+
+    public static boolean isZakumArm(int mobId) {
+        return mobId >= ZAKUM_ARM_1 && mobId <= ZAKUM_ARM_8;
+    }
+
+    public static final int HORNTAIL_PREHEAD_LEFT = 8810000;
+    public static final int HORNTAIL_PREHEAD_RIGHT = 8810001;
+    public static final int HORNTAIL_HEAD_A = 8810002;
+    public static final int HORNTAIL_HEAD_B = 8810003;
+    public static final int HORNTAIL_HEAD_C = 8810004;
+    public static final int HORNTAIL_HAND_LEFT = 8810005;
+    public static final int HORNTAIL_HAND_RIGHT = 8810006;
+    public static final int HORNTAIL_WINGS = 8810007;
+    public static final int HORNTAIL_LEGS = 8810008;
+    public static final int HORNTAIL_TAIL = 8810009;
+    public static final int DEAD_HORNTAIL_MIN = 8810010;
+    public static final int DEAD_HORNTAIL_MAX = 8810017;
+    public static final int HORNTAIL = 8810018;
+    public static final int SUMMON_HORNTAIL = 8810026;
+
+    public static boolean isDeadHorntailPart(int mobId) {
+        return mobId >= DEAD_HORNTAIL_MIN && mobId <= DEAD_HORNTAIL_MAX;
+    }
+
+    public static final int SCARLION_STATUE = 9420546;
+    public static final int SCARLION = 9420547;
+    public static final int ANGRY_SCARLION = 9420548;
+    public static final int FURIOUS_SCARLION = 9420549;
+    public static final int TARGA_STATUE = 9420541;
+    public static final int TARGA = 9420542;
+    public static final int ANGRY_TARGA = 9420543;
+    public static final int FURIOUS_TARGA = 9420544;
+
+    // Catch mobs
+    public static final int TAMABLE_HOG = 9300101;
+    public static final int GHOST = 9500197;
+    public static final int ARPQ_SCORPION = 9300157;
+    public static final int LOST_RUDOLPH = 9500320;
+    public static final int KING_SLIME_DOJO = 9300187;
+    public static final int FAUST_DOJO = 9300189;
+    public static final int MUSHMOM_DOJO = 9300191;
+    public static final int POISON_FLOWER = 9300175;
+    public static final int P_JUNIOR = 9500336;
+
+    // Friendly mobs
+    public static final int WATCH_HOG = 9300102;
+    public static final int MOON_BUNNY = 9300061;
+    public static final int TYLUS = 9300093;
+    public static final int JULIET = 9300137;
+    public static final int ROMEO = 9300138;
+    public static final int DELLI = 9300162;
+    public static final int GIANT_SNOWMAN_LV1_EASY = 9400322;
+    public static final int GIANT_SNOWMAN_LV1_MEDIUM = 9400327;
+    public static final int GIANT_SNOWMAN_LV1_HARD = 9400332;
+    public static final int GIANT_SNOWMAN_LV5_EASY = 9400326;
+    public static final int GIANT_SNOWMAN_LV5_MEDIUM = 9400331;
+    public static final int GIANT_SNOWMAN_LV5_HARD = 9400336;
+
+    // Dojo
+    private static final int DOJO_BOSS_MIN = 9300184;
+    private static final int DOJO_BOSS_MAX = 9300215;
+
+    public static boolean isDojoBoss(int mobId) {
+        return mobId >= DOJO_BOSS_MIN && mobId <= DOJO_BOSS_MAX;
+    }
+}
diff --git a/src/main/java/net/server/channel/handlers/AbstractDealDamageHandler.java b/src/main/java/net/server/channel/handlers/AbstractDealDamageHandler.java
index fe7aa626d1..047207788d 100644
--- a/src/main/java/net/server/channel/handlers/AbstractDealDamageHandler.java
+++ b/src/main/java/net/server/channel/handlers/AbstractDealDamageHandler.java
@@ -29,6 +29,7 @@ import client.status.MonsterStatusEffect;
 import config.YamlConfig;
 import constants.game.GameConstants;
 import constants.id.ItemId;
+import constants.id.MobId;
 import constants.skills.*;
 import net.AbstractPacketHandler;
 import net.packet.InPacket;
@@ -237,7 +238,7 @@ public abstract class AbstractDealDamageHandler extends AbstractPacketHandler {
                         }
                     }
 
-                    if (GameConstants.isDojoBoss(monster.getId())) {
+                    if (MobId.isDojoBoss(monster.getId())) {
                         if (attack.skill == 1009 || attack.skill == 10001009 || attack.skill == 20001009) {
                             int dmgLimit = (int) Math.ceil(0.3 * monster.getMaxHp());
                             List<Integer> _onedList = new LinkedList<>();
diff --git a/src/main/java/net/server/channel/handlers/MobDamageMobFriendlyHandler.java b/src/main/java/net/server/channel/handlers/MobDamageMobFriendlyHandler.java
index 566348416b..5c72d00d9d 100644
--- a/src/main/java/net/server/channel/handlers/MobDamageMobFriendlyHandler.java
+++ b/src/main/java/net/server/channel/handlers/MobDamageMobFriendlyHandler.java
@@ -22,6 +22,7 @@
 package net.server.channel.handlers;
 
 import client.Client;
+import constants.id.MobId;
 import net.AbstractPacketHandler;
 import net.packet.InPacket;
 import scripting.event.EventInstanceManager;
@@ -51,19 +52,19 @@ public final class MobDamageMobFriendlyHandler extends AbstractPacketHandler {
         int damage = Randomizer.nextInt(((monster.getMaxHp() / 13 + monster.getPADamage() * 10)) * 2 + 500) / 10; // Formula planned by Beng.
 
         if (monster.getHp() - damage < 1) {     // friendly dies
-            if (monster.getId() == 9300102) {
+            if (monster.getId() == MobId.WATCH_HOG) {
                 map.broadcastMessage(PacketCreator.serverNotice(6, "The Watch Hog has been injured by the aliens. Better luck next time..."));
-            } else if (monster.getId() == 9300061) {  //moon bunny
+            } else if (monster.getId() == MobId.MOON_BUNNY) {  //moon bunny
                 map.broadcastMessage(PacketCreator.serverNotice(6, "The Moon Bunny went home because he was sick."));
-            } else if (monster.getId() == 9300093) {   //tylus
+            } else if (monster.getId() == MobId.TYLUS) {   //tylus
                 map.broadcastMessage(PacketCreator.serverNotice(6, "Tylus has fallen by the overwhelming forces of the ambush."));
-            } else if (monster.getId() == 9300137) {   //juliet
+            } else if (monster.getId() == MobId.JULIET) {   //juliet
                 map.broadcastMessage(PacketCreator.serverNotice(6, "Juliet has fainted in the middle of the combat."));
-            } else if (monster.getId() == 9300138) {   //romeo
+            } else if (monster.getId() == MobId.ROMEO) {   //romeo
                 map.broadcastMessage(PacketCreator.serverNotice(6, "Romeo has fainted in the middle of the combat."));
-            } else if (monster.getId() == 9400322 || monster.getId() == 9400327 || monster.getId() == 9400332) { //snowman
+            } else if (monster.getId() == MobId.GIANT_SNOWMAN_LV1_EASY || monster.getId() == MobId.GIANT_SNOWMAN_LV1_MEDIUM || monster.getId() == MobId.GIANT_SNOWMAN_LV1_HARD) {
                 map.broadcastMessage(PacketCreator.serverNotice(6, "The Snowman has melted on the heat of the battle."));
-            } else if (monster.getId() == 9300162) {   //delli
+            } else if (monster.getId() == MobId.DELLI) {   //delli
                 map.broadcastMessage(PacketCreator.serverNotice(6, "Delli vanished after the ambush, sheets still laying on the ground..."));
             }
 
diff --git a/src/main/java/net/server/channel/handlers/MonsterBombHandler.java b/src/main/java/net/server/channel/handlers/MonsterBombHandler.java
index 64354e6817..ec461cbfd7 100644
--- a/src/main/java/net/server/channel/handlers/MonsterBombHandler.java
+++ b/src/main/java/net/server/channel/handlers/MonsterBombHandler.java
@@ -22,6 +22,7 @@
 package net.server.channel.handlers;
 
 import client.Client;
+import constants.id.MobId;
 import net.AbstractPacketHandler;
 import net.packet.InPacket;
 import server.life.Monster;
@@ -35,7 +36,7 @@ public final class MonsterBombHandler extends AbstractPacketHandler {
         if (!c.getPlayer().isAlive() || monster == null) {
             return;
         }
-        if (monster.getId() == 8500003 || monster.getId() == 8500004) {
+        if (monster.getId() == MobId.HIGH_DARKSTAR || monster.getId() == MobId.LOW_DARKSTAR) {
             monster.getMap().broadcastMessage(PacketCreator.killMonster(monster.getObjectId(), 4));
             c.getPlayer().getMap().removeMapObject(oid);
         }
diff --git a/src/main/java/net/server/channel/handlers/UseCatchItemHandler.java b/src/main/java/net/server/channel/handlers/UseCatchItemHandler.java
index a8b33a8b74..85b724a826 100644
--- a/src/main/java/net/server/channel/handlers/UseCatchItemHandler.java
+++ b/src/main/java/net/server/channel/handlers/UseCatchItemHandler.java
@@ -27,6 +27,7 @@ import client.autoban.AutobanManager;
 import client.inventory.InventoryType;
 import client.inventory.manipulator.InventoryManipulator;
 import constants.id.ItemId;
+import constants.id.MobId;
 import constants.inventory.ItemConstants;
 import net.AbstractPacketHandler;
 import net.packet.InPacket;
@@ -58,7 +59,7 @@ public final class UseCatchItemHandler extends AbstractPacketHandler {
         }
         switch (itemId) {
             case ItemId.PHEROMONE_PERFUME:
-                if (mob.getId() == 9300101) {
+                if (mob.getId() == MobId.TAMABLE_HOG) {
                     chr.getMap().broadcastMessage(PacketCreator.catchMonster(monsterid, itemId, (byte) 1));
                     mob.getMap().killMonster(mob, null, false);
                     InventoryManipulator.removeById(c, InventoryType.USE, itemId, 1, true, true);
@@ -67,7 +68,7 @@ public final class UseCatchItemHandler extends AbstractPacketHandler {
                 c.sendPacket(PacketCreator.enableActions());
                 break;
             case ItemId.POUCH:
-                if (mob.getId() == 9500197) {
+                if (mob.getId() == MobId.GHOST) {
                     if ((abm.getLastSpam(10) + 1000) < currentServerTime()) {
                         if (mob.getHp() < ((mob.getMaxHp() / 10) * 4)) {
                             chr.getMap().broadcastMessage(PacketCreator.catchMonster(monsterid, itemId, (byte) 1));
@@ -83,7 +84,7 @@ public final class UseCatchItemHandler extends AbstractPacketHandler {
                 }
                 break;
             case ItemId.ARPQ_ELEMENT_ROCK:
-                if (mob.getId() == 9300157) {
+                if (mob.getId() == MobId.ARPQ_SCORPION) {
                     if ((abm.getLastSpam(10) + 800) < currentServerTime()) {
                         if (mob.getHp() < ((mob.getMaxHp() / 10) * 4)) {
                             if (chr.canHold(ItemId.ARPQ_SPIRIT_JEWEL, 1)) {
@@ -108,7 +109,7 @@ public final class UseCatchItemHandler extends AbstractPacketHandler {
                 }
                 break;
             case ItemId.MAGIC_CANE:
-                if (mob.getId() == 9500320) {
+                if (mob.getId() == MobId.LOST_RUDOLPH) {
                     if (mob.getHp() < ((mob.getMaxHp() / 10) * 4)) {
                         chr.getMap().broadcastMessage(PacketCreator.catchMonster(monsterid, itemId, (byte) 1));
                         mob.getMap().killMonster(mob, null, false);
@@ -121,7 +122,7 @@ public final class UseCatchItemHandler extends AbstractPacketHandler {
                 c.sendPacket(PacketCreator.enableActions());
                 break;
             case ItemId.TRANSPARENT_MARBLE_1:
-                if (mob.getId() == 9300187) {
+                if (mob.getId() == MobId.KING_SLIME_DOJO) {
                     if (mob.getHp() < ((mob.getMaxHp() / 10) * 3)) {
                         chr.getMap().broadcastMessage(PacketCreator.catchMonster(monsterid, itemId, (byte) 1));
                         mob.getMap().killMonster(mob, null, false);
@@ -134,7 +135,7 @@ public final class UseCatchItemHandler extends AbstractPacketHandler {
                 c.sendPacket(PacketCreator.enableActions());
                 break;
             case ItemId.TRANSPARENT_MARBLE_2:
-                if (mob.getId() == 9300189) {
+                if (mob.getId() == MobId.FAUST_DOJO) {
                     if (mob.getHp() < ((mob.getMaxHp() / 10) * 3)) {
                         chr.getMap().broadcastMessage(PacketCreator.catchMonster(monsterid, itemId, (byte) 1));
                         mob.getMap().killMonster(mob, null, false);
@@ -147,7 +148,7 @@ public final class UseCatchItemHandler extends AbstractPacketHandler {
                 c.sendPacket(PacketCreator.enableActions());
                 break;
             case ItemId.TRANSPARENT_MARBLE_3:
-                if (mob.getId() == 9300191) {
+                if (mob.getId() == MobId.MUSHMOM_DOJO) {
                     if (mob.getHp() < ((mob.getMaxHp() / 10) * 3)) {
                         chr.getMap().broadcastMessage(PacketCreator.catchMonster(monsterid, itemId, (byte) 1));
                         mob.getMap().killMonster(mob, null, false);
@@ -160,7 +161,7 @@ public final class UseCatchItemHandler extends AbstractPacketHandler {
                 c.sendPacket(PacketCreator.enableActions());
                 break;
             case ItemId.EPQ_PURIFICATION_MARBLE:
-                if (mob.getId() == 9300175) {
+                if (mob.getId() == MobId.POISON_FLOWER) {
                     if (mob.getHp() < ((mob.getMaxHp() / 10) * 4)) {
                         chr.getMap().broadcastMessage(PacketCreator.catchMonster(monsterid, itemId, (byte) 1));
                         mob.getMap().killMonster(mob, null, false);
@@ -173,7 +174,7 @@ public final class UseCatchItemHandler extends AbstractPacketHandler {
                 c.sendPacket(PacketCreator.enableActions());
                 break;
             case ItemId.FISH_NET:
-                if (mob.getId() == 9500336) {
+                if (mob.getId() == MobId.P_JUNIOR) {
                     if ((abm.getLastSpam(10) + 3000) < currentServerTime()) {
                         abm.spam(10);
                         chr.getMap().broadcastMessage(PacketCreator.catchMonster(monsterid, itemId, (byte) 1));
@@ -203,7 +204,7 @@ public final class UseCatchItemHandler extends AbstractPacketHandler {
                             mob.getMap().killMonster(mob, null, false);
                             InventoryManipulator.removeById(c, InventoryType.USE, itemId, 1, true, true);
                             InventoryManipulator.addById(c, itemGanho, (short) 1, "", -1);
-                        } else if (mob.getId() != 9500336) {
+                        } else if (mob.getId() != MobId.P_JUNIOR) {
                             if (mobHp != 0) {
                                 abm.spam(10);
                                 c.sendPacket(PacketCreator.catchMessage(0));
diff --git a/src/main/java/server/expeditions/Expedition.java b/src/main/java/server/expeditions/Expedition.java
index 8875f9eaa8..764c24ea60 100644
--- a/src/main/java/server/expeditions/Expedition.java
+++ b/src/main/java/server/expeditions/Expedition.java
@@ -23,6 +23,7 @@
 package server.expeditions;
 
 import client.Character;
+import constants.id.MobId;
 import net.packet.Packet;
 import net.server.PlayerStorage;
 import net.server.Server;
@@ -51,35 +52,35 @@ import static java.util.concurrent.TimeUnit.MINUTES;
 public class Expedition {
 
     private static final int[] EXPEDITION_BOSSES = {
-            8800000,// - Zakum's first body
-            8800001,// - Zakum's second body
-            8800002,// - Zakum's third body
-            8800003,// - Zakum's Arm 1
-            8800004,// - Zakum's Arm 2
-            8800005,// - Zakum's Arm 3
-            8800006,// - Zakum's Arm 4
-            8800007,// - Zakum's Arm 5
-            8800008,// - Zakum's Arm 6
-            8800009,// - Zakum's Arm 7
-            8800010,// - Zakum's Arm 8
-            8810000,// - Horntail's Left Head
-            8810001,// - Horntail's Right Head
-            8810002,// - Horntail's Head A
-            8810003,// - Horntail's Head B
-            8810004,// - Horntail's Head C
-            8810005,// - Horntail's Left Hand
-            8810006,// - Horntail's Right Hand
-            8810007,// - Horntail's Wings
-            8810008,// - Horntail's Legs
-            8810009,// - Horntail's Tails
-            9420546,// - Scarlion Boss
-            9420547,// - Scarlion Boss
-            9420548,// - Angry Scarlion Boss
-            9420549,// - Furious Scarlion Boss
-            9420541,// - Targa
-            9420542,// - Targa
-            9420543,// - Angry Targa
-            9420544,// - Furious Targa
+            MobId.ZAKUM_1,
+            MobId.ZAKUM_2,
+            MobId.ZAKUM_3,
+            MobId.ZAKUM_ARM_1,
+            MobId.ZAKUM_ARM_2,
+            MobId.ZAKUM_ARM_3,
+            MobId.ZAKUM_ARM_4,
+            MobId.ZAKUM_ARM_5,
+            MobId.ZAKUM_ARM_6,
+            MobId.ZAKUM_ARM_7,
+            MobId.ZAKUM_ARM_8,
+            MobId.HORNTAIL_PREHEAD_LEFT,
+            MobId.HORNTAIL_PREHEAD_RIGHT,
+            MobId.HORNTAIL_HEAD_A,
+            MobId.HORNTAIL_HEAD_B,
+            MobId.HORNTAIL_HEAD_C,
+            MobId.HORNTAIL_HAND_LEFT,
+            MobId.HORNTAIL_HAND_RIGHT,
+            MobId.HORNTAIL_WINGS,
+            MobId.HORNTAIL_LEGS,
+            MobId.HORNTAIL_TAIL,
+            MobId.SCARLION_STATUE,
+            MobId.SCARLION,
+            MobId.ANGRY_SCARLION,
+            MobId.FURIOUS_SCARLION,
+            MobId.TARGA_STATUE,
+            MobId.TARGA,
+            MobId.ANGRY_TARGA,
+            MobId.FURIOUS_TARGA,
     };
 
     private final Character leader;
diff --git a/src/main/java/server/life/MobSkill.java b/src/main/java/server/life/MobSkill.java
index 0228528eec..26241eedc8 100644
--- a/src/main/java/server/life/MobSkill.java
+++ b/src/main/java/server/life/MobSkill.java
@@ -25,6 +25,7 @@ import client.Character;
 import client.Disease;
 import client.status.MonsterStatus;
 import constants.game.GameConstants;
+import constants.id.MobId;
 import net.server.services.task.channel.OverallService;
 import net.server.services.type.ChannelServices;
 import server.maps.MapObject;
@@ -265,17 +266,17 @@ public class MobSkill {
                                 xpos = (int) monster.getPosition().getX();
                                 ypos = (int) monster.getPosition().getY();
                                 switch (mobId) {
-                                    case 8500003: // Pap bomb high
+                                    case MobId.HIGH_DARKSTAR: // Pap bomb high
                                         toSpawn.setFh((int) Math.ceil(Math.random() * 19.0));
                                         ypos = -590;
                                         break;
-                                    case 8500004: // Pap bomb
+                                    case MobId.LOW_DARKSTAR: // Pap bomb
                                         xpos = (int) (monster.getPosition().getX() + Randomizer.nextInt(1000) - 500);
                                         if (ypos != -590) {
                                             ypos = (int) monster.getPosition().getY();
                                         }
                                         break;
-                                    case 8510100: //Pianus bomb
+                                    case MobId.BLOODY_BOOM: //Pianus bomb
                                         if (Math.ceil(Math.random() * 5) == 1) {
                                             ypos = 78;
                                             xpos = Randomizer.nextInt(5) + (Randomizer.nextInt(2) == 1 ? 180 : 0);
@@ -301,7 +302,7 @@ public class MobSkill {
                                         break;
                                 }
                                 toSpawn.setPosition(new Point(xpos, ypos));
-                                if (toSpawn.getId() == 8500004) {
+                                if (toSpawn.getId() == MobId.LOW_DARKSTAR) {
                                     map.spawnFakeMonster(toSpawn);
                                 } else {
                                     map.spawnMonsterWithEffect(toSpawn, getSpawnEffect(), toSpawn.getPosition());
diff --git a/src/main/java/server/life/Monster.java b/src/main/java/server/life/Monster.java
index fce1e1e3bd..2c7f2ec7c6 100644
--- a/src/main/java/server/life/Monster.java
+++ b/src/main/java/server/life/Monster.java
@@ -26,6 +26,7 @@ import client.*;
 import client.status.MonsterStatus;
 import client.status.MonsterStatusEffect;
 import config.YamlConfig;
+import constants.id.MobId;
 import constants.skills.*;
 import net.packet.Packet;
 import net.server.audit.LockCollector;
@@ -761,7 +762,7 @@ public class Monster extends AbstractLoadedLife {
         final List<Integer> toSpawn = this.getRevives();
         if (toSpawn != null) {
             final MapleMap reviveMap = map;
-            if (toSpawn.contains(9300216) && reviveMap.getId() > 925000000 && reviveMap.getId() < 926000000) {
+            if (toSpawn.contains(MobId.TRANSPARENT_ITEM) && reviveMap.getId() > 925000000 && reviveMap.getId() < 926000000) {
                 reviveMap.broadcastMessage(PacketCreator.playSound("Dojang/clear"));
                 reviveMap.broadcastMessage(PacketCreator.showEffect("dojang/end/clear"));
             }
@@ -790,9 +791,9 @@ public class Monster extends AbstractLoadedLife {
                         }
                         reviveMap.spawnMonster(mob);
 
-                        if (mob.getId() >= 8810010 && mob.getId() <= 8810017 && reviveMap.isHorntailDefeated()) {
+                        if (MobId.isDeadHorntailPart(mob.getId()) && reviveMap.isHorntailDefeated()) {
                             boolean htKilled = false;
-                            Monster ht = reviveMap.getMonsterById(8810018);
+                            Monster ht = reviveMap.getMonsterById(MobId.HORNTAIL);
 
                             if (ht != null) {
                                 ht.lockMonster();
@@ -808,7 +809,7 @@ public class Monster extends AbstractLoadedLife {
                                 }
                             }
 
-                            for (int i = 8810017; i >= 8810010; i--) {
+                            for (int i = MobId.DEAD_HORNTAIL_MAX; i >= MobId.DEAD_HORNTAIL_MIN; i--) {
                                 reviveMap.killMonster(reviveMap.getMonsterById(i), killer, true);
                             }
                         } else if (controller != null) {
diff --git a/src/main/java/server/maps/MapleMap.java b/src/main/java/server/maps/MapleMap.java
index 31a7866bad..7ec9a932c3 100644
--- a/src/main/java/server/maps/MapleMap.java
+++ b/src/main/java/server/maps/MapleMap.java
@@ -33,6 +33,7 @@ import client.status.MonsterStatus;
 import client.status.MonsterStatusEffect;
 import config.YamlConfig;
 import constants.game.GameConstants;
+import constants.id.MobId;
 import constants.inventory.ItemConstants;
 import net.packet.Packet;
 import net.server.Server;
@@ -1301,11 +1302,11 @@ public class MapleMap {
     }
 
     public boolean damageMonster(final Character chr, final Monster monster, final int damage) {
-        if (monster.getId() == 8800000) {
+        if (monster.getId() == MobId.ZAKUM_1) {
             for (MapObject object : chr.getMap().getMapObjects()) {
                 Monster mons = chr.getMap().getMonsterByOid(object.getObjectId());
                 if (mons != null) {
-                    if (mons.getId() >= 8800003 && mons.getId() <= 8800010) {
+                    if (mons.getId() >= MobId.ZAKUM_ARM_1 && mons.getId() <= MobId.ZAKUM_ARM_8) {
                         return true;
                     }
                 }
@@ -1412,13 +1413,13 @@ public class MapleMap {
                         }
                     }
 
-                    if (monster.getId() >= 8800003 && monster.getId() <= 8800010) {
+                    if (MobId.isZakumArm(monster.getId())) {
                         boolean makeZakReal = true;
                         Collection<MapObject> objects = getMapObjects();
                         for (MapObject object : objects) {
                             Monster mons = getMonsterByOid(object.getObjectId());
                             if (mons != null) {
-                                if (mons.getId() >= 8800003 && mons.getId() <= 8800010) {
+                                if (MobId.isZakumArm(mons.getId())) {
                                     makeZakReal = false;
                                     break;
                                 }
@@ -1430,7 +1431,7 @@ public class MapleMap {
                             for (MapObject object : objects) {
                                 Monster mons = map.getMonsterByOid(object.getObjectId());
                                 if (mons != null) {
-                                    if (mons.getId() == 8800000) {
+                                    if (mons.getId() == MobId.ZAKUM_1) {
                                         makeMonsterReal(mons);
                                         break;
                                     }
@@ -1974,13 +1975,13 @@ public class MapleMap {
         }
 
         if (monster.getDropPeriodTime() > 0) { //9300102 - Watchhog, 9300061 - Moon Bunny (HPQ), 9300093 - Tylus
-            if (monster.getId() == 9300102) {
+            if (monster.getId() == MobId.WATCH_HOG) {
                 monsterItemDrop(monster, monster.getDropPeriodTime());
-            } else if (monster.getId() == 9300061) {
+            } else if (monster.getId() == MobId.MOON_BUNNY) {
                 monsterItemDrop(monster, monster.getDropPeriodTime() / 3);
-            } else if (monster.getId() == 9300093) {
+            } else if (monster.getId() == MobId.TYLUS) {
                 monsterItemDrop(monster, monster.getDropPeriodTime());
-            } else if (monster.getId() == 9400326 || monster.getId() == 9400331 || monster.getId() == 9400336) {
+            } else if (monster.getId() == MobId.GIANT_SNOWMAN_LV5_EASY || monster.getId() == MobId.GIANT_SNOWMAN_LV5_MEDIUM || monster.getId() == MobId.GIANT_SNOWMAN_LV5_HARD) {
                 monsterItemDrop(monster, monster.getDropPeriodTime());
             } else {
                 FilePrinter.printError(FilePrinter.UNHANDLED_EVENT, "UNCODED TIMED MOB DETECTED: " + monster.getId());
@@ -4033,7 +4034,7 @@ public class MapleMap {
     }
 
     public boolean isHorntailDefeated() {   // all parts of dead horntail can be found here?
-        for (int i = 8810010; i <= 8810017; i++) {
+        for (int i = MobId.DEAD_HORNTAIL_MIN; i <= MobId.DEAD_HORNTAIL_MAX; i++) {
             if (getMonsterById(i) == null) {
                 return false;
             }
@@ -4043,10 +4044,10 @@ public class MapleMap {
     }
 
     public void spawnHorntailOnGroundBelow(final Point targetPoint) {   // ayy lmao
-        Monster htIntro = LifeFactory.getMonster(8810026);
+        Monster htIntro = LifeFactory.getMonster(MobId.SUMMON_HORNTAIL);
         spawnMonsterOnGroundBelow(htIntro, targetPoint);    // htintro spawn animation converting into horntail detected thanks to Arnah
 
-        final Monster ht = LifeFactory.getMonster(8810018);
+        final Monster ht = LifeFactory.getMonster(MobId.HORNTAIL);
         ht.setParentMobOid(htIntro.getObjectId());
         ht.addListener(new MonsterListener() {
             @Override
@@ -4064,8 +4065,8 @@ public class MapleMap {
         });
         spawnMonsterOnGroundBelow(ht, targetPoint);
 
-        for (int x = 8810002; x <= 8810009; x++) {
-            Monster m = LifeFactory.getMonster(x);
+        for (int mobId = MobId.HORNTAIL_HEAD_A; mobId <= MobId.HORNTAIL_TAIL; mobId++) {
+            Monster m = LifeFactory.getMonster(mobId);
             m.setParentMobOid(htIntro.getObjectId());
 
             m.addListener(new MonsterListener() {