- Roxas - The main protagonist and number XIII in The Organization. Weilder of the Kingdom Key.
- Mario - (AI Controlled) The older and more heroic brother of the Mario Bros.
- Luigi - (AI Controlled) The younger and more timid brother of the Mario Bros.
- Yoshi - (AI Controlled/Ridable) The Mario Bros.'s dinosaur companion and supposed leader of his species.
- Captain Olimar - A traveling spaceman who traveled to the Distant Planet from his home planet and leader of the Pikmin.
- Geno - A possessed doll from Star Road.
- Pikachu - The electric mouse Pokemon from Kanto.
- Kirby - A young pink puffball from Pop Star who can inhale enemies and gain their abilities, even the Heartless...
- Link - (AI Controlled) The hero of Hyrule and wielder of the Master Sword.
- Meta Knight - A mysterious anti-hero from Pop Star and wielder of the Galaxia Sword.
- Lucario - The aura Pokemon from Sinnoh.
- Baby Mario - The baby version of Mario. He is searching for the baby version of Luigi, Baby Luigi.
- Bowser - King of the Koopas and hopeful future ruler of The Mushroom Kingdom. Bowser is also the Mario Bros.'s archenemy and he captured Princess Peach.
- Bowser Jr. - Bowser's malevolent son and Prince of the Koopas.
- Wario - Mario's gross rival and Nobody.
- Waluigi - Wario's brother and Luigi's rival and Nobody.
- King Dedede - The self-proclaimed king of Dreamland.
- Ganondorf - Link's archenemy and capturer of Princess Zelda.
- Baby Bowser - The Baby version of Bowser and enemy of Yoshi.
- Organization XIII - An evil organization that captures hearts that Roxas was previously a part of.
- Toad - The servant and retainer of Princess Peach. Can poison and stun enemies with Poison Mushrooms.
- Waddle Dee - A friend of Kirby. Abilities are unknown at the time.
- Mew - A powerful legendary Pokemon. Can use psychic to confuse enemies and stun them.
- Mallow - A cloud creature and Prince of Nimbus Land. Can use powerful symbols to damage enemies.
More to come...