Fatty

208.0

This article is about the monster. For the boss, see Mega Fatty.

The Fatty is occasionally found in The Basement. It walks slowly toward Isaac. Occasionally, if Isaac approaches one, it will stop to fart, which will push him back without dealing damage. This will also push away adjacent enemies to a lesser degree.

Variations

Pale Fatty

208.1
{

Pale Fatties can often be found in groups in The Depths. They behave like Fatties, but will also spit out 6 blood shots when farting. When killed, they can become Blubbers.

Flaming Fatty

208.2
Chance To Replace Fatties In Burning Basement

Flaming Fatties behave identically to regular Fatties, but have a chance to leave behind a damaging flame upon death.

Fat Sack

209.0

They are commonly found in groups of one to three, and can also be found together with Pale Fatties. Fat Sacks leap offscreen and attempt to land on Isaac, shooting 6 bullets outwards and leaving a puddle of creep behind when it lands. Like Pale Fatties, they can turn into Blubbers when killed. These monsters behave very similarly to Leapers.

Blubber

210.0

Blubbers walk aimlessly around the room, randomly spewing blood around itself. When killed, there is a chance for it to become a Half Sack.

Half Sack

211.0

Half Sacks walk aimlessly around the room and leave red creep behind them.

Conjoined Fatty

257.0

Conjoined Fatties slowly walk towards Isaac and occasionally pause to fart out a line of damaging green creep. There is a chance that upon death, it will turn into a regular Fatty.

If killed while farting, the creep line won't grow to its full length. It will instead stop spreading the instant the Conjoined Fatty is killed.

Blue Conjoined Fatty

257.1

Blue Conjoined Fatties slowly walk towards Isaac and occasionally fart out a homing purple Ipecac shot at Isaac. Unlike normal Conjoined Fatties, they won't turn into any kind of Fatty upon death.

Notes

• Only appears in Normal mode.

Stoney

302.0
Chance To Replace Pale Fatties
Defeat The Lamb for the 1st timeThe gate is open!

Stoneys walk towards Isaac while blocking his shots. They stop and catch their breath after chasing Isaac for a few seconds. They do not deal contact damage but will often push Isaac around. They are invincible, but die when the room is cleared, similar to the Death's Head enemies. Stoney is unlocked by defeating The Lamb for the first time.

Notes

• If Stonies aren't unlocked yet, Conjoined Fatties will usually spawn in their rooms instead, although Fatties are also placeholders for Stonies in some rooms.
• Spectral tears and piercing tears will pierce through Stoneys.
• If they are poisoned with The VirusInflicts poison to enemies who make contact with Isaac. Speed down., upon clearing the room, they have a chance to drop a black heart despite not taking damage.
• Touching a Stoney can break open WalnutTaking damage has a small chance to destroy the trinket and spawn various pickups..
• Stoneys are immune to all Status Effects.
• Stoneys can be killed with Chaos CardThrows the card to kill anything in its path. Opens normal doors., EuthanasiaAdds a chance to fire needles. If a needle kills an enemy, it bursts into more needles., and Little HornAdds a chance to fire a piercing tear that instantly kills any enemy that it touches..
• Stoneys were nerfed in update v1.06.0188 by making them pause in exhaustion after following the player. Prior to that, Stonies would continually chase the player.

Cross Stoney

302.10
Chance To Replace Stoneys in challenge #32 (Aprils Fool)
Defeat The Lamb for the 1st timeThe gate is open!

Cross Stoneys are a new type of Stoney added in Booster Pack #5. These new enemies act like a hybridization of a Stoney and a Cross Stone Shooter; they constantly chase the player like a Stoney but will shoot 4 shots outward vertically and diagonally like a Cross Grimace.

Cross Stoneys only appear in challenge #32 (Aprils Fool) as replacements to regular Stoneys.

Trivia

• Conjoined Fatties and Blue Conjoined Fatties suffer the condition of polycephaly, having more than one head.
• Conjoined Fatties and Blue Conjoined Fatties make the same high-pitched growling noises as Gapers instead of the lower-pitched ones used by other Fatties.
• Stoneys look very similar to Stone Grimaces with bodies.
• Stoneys make the sounds of a pitched-down Gaper.
• Cross Stoneys do not appear in regular runs; they only appear in the Aprils Fool challenge.
• Antibirth developer Kilburn first revealed Cross Stoneys on the 1st of April for Booster Pack #5.
  • It was revealed on the 1st of April, and Cross Stoneys are exclusive to the Aprils Fool Challenge.

Gallery

• 

  Fatty on Isaac's Last Will.