The Dungeon Boss Cup is an Arena Cup that contains every dungeon boss in the game aside from Gastropolis.
- Description: Take on stronger versions of the boss fights of all the temples and dungeons.
- Arena Coins: 13500
- Level: 60
- Difficulty:

- Rounds: 7
- Unlock method: Unlocked by default.
The cup consists of 9 rounds:
| Name | Description | Enemies | Score | Bonus Objectives |
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| Rush Mode | Clear every round without stopping and only regenerate 50% of your health between rounds. | All bosses in order. | ||
| 01: The Lethal Turret | Beat a stronger version of the Rhombus Heavy Turret 2.0 boss from Rhombus Dungeon! |
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| 02: The Frozen Robot | Beat a stronger version of the Infected Digmo boss from Temple Mine! |
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| 03: The Colossal Gear | Beat a stronger version of the X01 Driller H.F.S. boss from Temple Mine! |
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| 04: The Fierce Antlion | Beat a stronger version of the Pinzo'jrahrrrn boss from Faj'ro Temple! |
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| 05: The Gigantic Moth | Beat a stronger version of the Master Magmoth boss from Faj'ro Temple! |
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| 06: The Ghost of Lightning | Beat a stronger version of the Plasma Phantom boss from Zir'vitar Temple! |
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| 07: The Mighty Blob | Beat a stronger version of the Sir Blobus Starnikus boss from So'najiz Temple! |
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| 08: The Ape Warrior | Beat a stronger version of the Son of the East boss from Grand Krys'kajo! |
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| 09: The Monstrous Whale | Beat stronger versions of the Son of the East and Ancient Guardian boss from Grand Krys'kajo! |
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Arena Coin Rewards
- A Bronze Medal gives 200 Arena Coins
- A Silver Medal gives 300 Arena Coins
- A Gold Medal gives 500 Arena Coins
- The Rush Mode Bronze Medal gives 900 Arena Coins
- The Rush Mode Silver Medal gives 1350 Arena Coins
- The Rush Mode Gold Medal gives 2250 Arena Coins