Encounter map
Where to find Baby Plum
Random boss poolsBaby Plum appears in 3 random floor pools. The weights below are relative to the other entries in each pool, not a guaranteed encounter chance.
Compare bosses in basementFight guide · Basement / Cellar / Burning Basement
How to fight Baby Plum
Baby Plum combines moving projectile patterns with a ground slam. You can also spare her in her own Boss Room.
Normal boss behavior in Repentance. Champion variants can change these patterns.
Before entering
Leave room to sidestep her moving attacks. If sparing her, avoid damaging her with tears, bombs, or passive effects.
- 1
Backward recoil
Watch for: A projectile stream propels Plum backward, bouncing her off walls.
Try: Track both the stream and her changing position rather than following directly behind.
- 2
Moving spiral
Watch for: Plum twirls toward Isaac while releasing a spiral of shots.
Try: Give the spiral space to open and move through a gap without touching her.
- 3
Slam and final ring
Watch for: A ground slam creates two projectile rings and red creep; defeating her releases another ring.
Try: Step away from the landing area and keep dodging after her health runs out.
Game-file pools
Spawn entries
Game-file referenceRaw data and official artEntity fields, portrait files, and source notes for this boss.
Raw entity values
Health and entity data
- Base HP
- 234
- Stage HP scaling value
- 0
- Entity ID and variant
- 908.0
- Contact damage field
- 1
These are raw entity fields. Armor, floor scaling, phase transitions, shared health, and scripted waves can make the fight differ from the base HP value.
Asset mapping
Official portrait assets
The Baby Plum versus-screen portrait comes from the supplied game art. The original filenames are retained below.
- Portrait file
- Portrait_908.0_BabyPlum.png
- Boss-name image file
- BossName_BabyPlum.png
Source notes
How this record is built
Boss identity and portrait metadata come from bossportraits.xml. Random floor membership, weights, and Double Trouble room IDs come from bosspools.xml. Health and entity fields come from entities2.xml. Fixed story locations and route explanations are reviewed editorial context.
The portrait record is gated by achievement ID 347 in the game data.