Mega Fatty

Boss

Double Trouble

(With Pin)

Degraded Boss

Mega Fatty is a boss that appears in The Caves. He is the boss version of the Fatties.

Behavior[edit | edit source]

Mega Fatty has 5 attacks in total:

He will jump off-screen and land in the player's position, leaving Red Creep when he lands.
He will briefly slide towards the player and perform a short-range jump, also leaving Red Creep when he lands.
He will inhale and draw the player, objects, and any monsters towards him, and then vomit upwards, unleashing a barrage of projectiles in the player's direction. The vomit itself is harmless, but the projectiles it produces will seek until they land, rather than until he stops spawning them, so the player should keep moving.
He will occasionally fart, which can damage Isaac if he's too close, and will either:
- Summon 1-3 Dips.
- Unleash a cluster of projectiles behind him, similar to Monstro.

Brown: Has 15% more HP (690). He never uses his vomit attack and sends out rock waves instead of leaving Red Creep upon landing when performing the long-range jump, similar to The Cage.
Red: 33% smaller and has 10% less HP (540). Shoots 6 bullets instead of leaving Red Creep upon landing. Poops Red Poop instead of Dips. Vomit attack moves outward in a pattern similar to Mom's Heart/It Lives' four slower bullet stream attacks.

Mega Fatty ingame.
Brown Champion Mega Fatty.
Red Champion Mega Fatty.
Mega Fatty as one of Delirium's forms.
An unused variant of Mega Fatty found in the game files.
Concept art for Mega Fatty on the top middle and top right, along with other Rebirth boss concept arts.

When Mega Fatty is shooting out his barrage of projectiles, it is very easy to see the shadows of the projectiles, allowing you to determine when it is safe to stop moving.
The Lost Contact will still block all incoming projectiles from his barrage even if they happen to go high enough to be offscreen.

The Cage is the posthumous version of Mega Fatty.
Mega Fatty has the highest health of any boss fought in Chapter 2.
The picture of Mega Fatty on Isaac's last will closely resembles the unused variant.

Bosses
Chapter 1	Gemini • Steven • Blighted Ovum • Dingle • The Duke of Flies • Famine • Fistula • Gurglings • The Haunt • Larry Jr. • Monstro • Pin • Widow • The Fallen • The Headless Horseman Dangle • Little Horn • Rag Man • Turdlings
Chapter 2	Chub • C.H.A.D. • Carrion Queen • Dark One • Gurdy • Gurdy Jr. • The Hollow • The Husk • Mega Fatty • Mega Maw • Peep • Pestilence • Polycephalus • The Wretched • The Fallen • The Headless Horseman The Forsaken • The Frail • The Stain Big Horn • Rag Mega
Chapter 3	The Adversary • The Bloat • The Cage • The Gate • Monstro II • Gish • Loki • Mask of Infamy • War • The Fallen • The Headless Horseman • Mom Brownie Sisters Vis
Chapter 4	Blastocyst • The Bloat • Conquest • Daddy Long Legs • Triachnid • Death • Lokii • Mama Gurdy • Mr. Fred • Scolex • Teratoma • The Fallen • The Headless Horseman • Mom's Heart • It Lives Sisters Vis • The Matriarch
Blue Womb	Hush
Chapter 5	Satan • Isaac
Chapter 6	??? • The Lamb • Mega Satan
The Void	Delirium
Greed Mode	Ultra Greed Ultra Greedier