Regen (リジェネ Rijene?) is a passive ability featured in Kingdom Hearts: Chain of Memories, Kingdom Hearts Re:Chain of Memories, Kingdom Hearts Birth by Sleep, and Kingdom Hearts Re:coded. In Kingdom Hearts 358/2 Days, Cura has the same effect as Regen. In Kingdom Hearts Chain of Memories, it heals Sora/Riku for 1% of their max HP, lasts for 10 heals, heals are increased to a max of 35% of their Max HP and happen more quickly when HP is closer to the alarm zone. In Kingdom Hearts Re:coded, it is used as a license in the Olympus Coliseum, and restores 10% of each ally's HP at the end of every turn for 6 turns.
- The Oogie Boogie card has "Regen" as its ability.
- Regen is the second effect for the Cinderella D-Link.
Kingdom Hearts Re:coded
- Sora is given the Regen license by a moogle when in the maze of the Olympus Coliseum, after finishing Layer 2.
Regen is derived from the word 'regenerate'.