Kingdom Smash Brothers: Fighting For Your Life

Kingdom Smash Brothers: Fighting For Your Life  is a Japanese-American action role-playing game developed by Nintendo and Square-Enix.

Plot
Xion is swallowed by the darkness, but with some help, ends up in the Super Smash Brothers world. There, she faces new challenges and new friends. How will she deal with this new pressure? Will she ever get back to Roxas and the Organization? Or is she stuck?