Successfully complete the indicated task to unlock the corresponding character in Mission mode.

Character	How to unlock
Donald	Reach Day 244 in Story mode.
Goofy	Reach Day 277 in Story mode.
King Mickey	Successfully complete the game, then purchase the Return Of The King item from the Moogle Shop.
Riku	Reach Day 171 in Story mode.
Sora	Successfully complete all missions (100% game completion), then purchase the Soul Of Sora item from the Moogle Shop.
Xion	Reach Day 96 in Story mode.