Nintendo Hearts: Rise of Galaxia

Nintendo X Sega X Kingdom Hearts: Rise of Galaxia is a Japanese-American action role-playing video game that is a collaboration of Nintendo, Sega, Disney, Final Fantasy, and The World Ends With You.

Plot
An entity known as Galaxia plans to make a "complete world", and to do so, she needs to destroy many existing worlds, so four young heroes, teamed up with other heroes from various video game franchises, work together to stop Galaxia from destroying their worlds.

Main

 * Zach Lewis
 * Megan Walker
 * Justin Cardoza
 * Sofia Kingsley

Antagonists

 * Galaxia

Sega Characters

 * Sonic the Hedgehog

Disney Characters

 * Mickey Mouse