Binding of Isaac: Rebirth Wiki

Bum Friend is a passive item.


  • Spawns a familiar who follows Isaac and picks up coins on the ground. (He does not fill up a familiar "slot".)
  • After picking up 6 coins, Bum Friend will drop a pickup.
  • After that, Bum Friend has a 67% chance to drop a pickup after picking up 3 coins and a 33% chance to drop a pickup after picking up 4 coins.
  • Added in Afterbirth This item belongs to the Super Bum set. Collecting three items from this set will transform Isaac's bums into Super Bum.


  • Bum Friend cannot pick up Added in Afterbirth Sticky Nickel Sticky Nickels.
  • Bum Friend can pick up Added in Afterbirth Lucky Penny Lucky Pennies, but it will simply count as a regular Penny and will not grant luck.
  • From a scoring perspective, Pennies that Bum Friend picks up count towards your Schwag bonus on daily runs. (only applies to Afterbirth and Afterbirth ✞ dailies)



  • BFFS! BFFS!: All future drops will happen every 3 coins. If the next scheduled drop at the moment of acquiring BFFS! requires more than 3 coins, the amount will not be lowered.
  • Mitre Mitre: Red Heart Red Hearts that Bum drops can be converted into Soul Heart Soul Hearts.

In-game Footage[]



PC M9JC ZYAL (Treasure Room adjacent to spawn)

PC Normal mode only 2YN8 JS3R (Treasure Room adjacent to spawn)

PC MG9V SPR7 (Treasure Room adjacent to spawn)

PC 3MR7 XNJS (First floor Treasure Room)

PC GNBR EEGK (First floor Treasure Room)

PS4 A1TT QRBE (First floor Treasure Room)

3DS WVFY R43V (First floor Treasure Room; Curse of the Labyrinth)


Bug Bug! 3DS If hit by an explosion before finishing collection on the room, Bum Friend may freeze in place.