Adventure Time RPG bosses
Updated October 23, 2026 · 7 bosses and mini-bosses
Every adventure ends in a boss, and the Dungeon Train throws mini-bosses at you between rooms. Here is where each one appears and the trick to beating it.
| Boss | Type | Where |
|---|---|---|
| Ice King | Boss | Tutorial, Ice Palace |
| The Doorkeeper | Mini-boss | Mount Cragdor |
| King Worm | Boss | Mount Cragdor (final area) |
| The Ogre | Boss | Mount Cragdor on higher difficulties |
| Bucket Knight | Boss | Dungeon of the Crystal Eye |
| Heart Beast | Mini-boss | Dungeon Train (early rooms) |
| Demon Cat | Boss | Dungeon Train (deeper rooms) |
Ice King
Boss Tutorial, Ice Palace
- Penguins come first; clear them with basic attacks.
- Stay close and use E and Q on cooldown. He gives up when beaten.
- Don't dodge yourself into the arena edge.
The Doorkeeper
Mini-boss Mount Cragdor
- He can hypnotise you and leave you stuck for a moment.
- Don't charge in head-first; let him come to you.
King Worm
Boss Mount Cragdor (final area)
- He burrows underground and calls in small worms.
- Clear the small worms first, then punish him when he surfaces.
- Mark him with BMO (F) before your Q special.
The Ogre
Boss Mount Cragdor on higher difficulties
- Named by the developer as one of the legendary bosses.
- Bring a party on Hard and save Medicine Milk for this fight.
Bucket Knight
Boss Dungeon of the Crystal Eye
- He splashes water in a ring around himself.
- Stand right next to him: the splash ring does not reach you there.
Heart Beast
Mini-boss Dungeon Train (early rooms)
- Appears within the first ten rooms of the train.
- Beat it for a chest that can hold Gems.
Demon Cat
Boss Dungeon Train (deeper rooms)
- Shows up deep in the train with King Worm and other repeats.
- Pick heal and cooldown blessings before you reach him.
General boss tips
- Clear the adds first. Most bosses call in smaller enemies; they do more damage than you expect.
- Debuff, then burst. Mark (BMO) or curse (Peppermint Butler) the boss, then use Q. See buddies.
- Dodge with Shift and watch for red warning rings before big hits.
- Heal early. Spill Medicine Milk at around 40% health; it heals over time.
- Upgrade before Hard. If a boss walls you, power up your main weapon and come back.
Boss badges
- Boss Basher: Defeat 10 bosses (18,013 players)
- Boss Hunter: Defeat 50 bosses (1,703 players)
- Ooo's Most Dangerous: Defeat 200 bosses (5 players)