Binding of Isaac: Rebirth Wiki
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Mega Fatty is a boss that can appear:

Behavior[ | ]

  • Leaps off-screen and tries to land on Isaac's position, leaving a large puddle of Red Creep upon landing.
  • Slides briefly towards Isaac and performs a short-range jump, also leaving Red Creep when he lands.
  • Inhales, drawing in Isaac and any monsters towards him, before then vomiting upwards, unleashing a barrage of projectiles into the air. The projectiles will rain down for a short duration, following Isaac's movements.
  • Farts, which can damage Isaac if he's too close, and will either:
    • Summon 1-3 DipDips.
    • Unleash a cluster of either small or big projectiles behind him, similar to Boss Monstro ingameMonstro.

Champion Versions Needs to be unlocked[ | ]

(except in Rebirth) Brown: Has 15% more HP (690). He will not use his vomit attack and sends out rock waves instead of leaving Red Creep upon landing when performing the long-range jump, similar to Boss The Cage ingameThe Cage.
(except in Rebirth) Red: 33% smaller and has 10% less HP (540). Shoots 6 bullets instead of leaving Red Creep upon landing. Creates Red PoopRed Poop instead of Dips. Vomit attack sends out four projectiles stream attacks in a pattern similar to Boss Mom's Heart ingameMom's Heart/ Boss It Lives ingameIt Lives. Due to the high tear height of the vomit attack projectiles, it is nearly impossible to get hit by them.

Gallery[ | ]

Notes[ | ]

  • Collectible Lost Contact iconLost Contact will still block all incoming projectiles from his barrage, even if they happen to go high enough to be offscreen.

Trivia[ | ]

  • He is the boss version of the FattyFatties.
  • Boss The Cage ingameThe Cage is the posthumous version of Mega Fatty.
  • The picture of Mega Fatty on Isaac's last will closely resembles the unused variant.


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