Belly Button
ItemAfterbirth+Unlocked
passiveGame ID 458★★★★
How do you unlock Belly Button?
Verified starting unlockSource data confirms that no unlock is required.
Drops a random trinket. Grants a second trinket slot.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Belly Button leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13