ABC. Easy as KING-DOM HEARTS! O.o

The Underworld

V-Vexen

W - Wisdom Form

xemnas

Y - Yuffie

:moomba: :moomba: :moomba: Kurt Zisa:moomba: :moomba: :moomba:
(I don't know who he is, but he is definitely a part of Kingdom Hearts)

A - All's End

Beast

C - Crime & Punishment (Final Form ability)

:moomba: :moomba: :moomba: The Door to Darkness:moomba: :moomba: :moomba:

E - Explosion (Sora ability)

:moomba: :moomba: :moomba: Fira :moomba: :moomba: :moomba:

G- Gunblade

H-Hades

I - Iago