Kingdom Smash Brothers: The Ultimate Showdown

Super Smash Brothers and Kingdom Hearts: Forever Land of Muses is an American video game crossover that features Nintendo, SEGA, Capcom, Bandai-Namco, Ubi Soft, RockStar Games, Konami, Activision, The Walt Disney Company, Final Fantasy, and The World Ends With You characters. the main theme for crossover is: Billy Joel's "Just The Way You Are", which was originally featured in the 1977 album, The Stranger.

plot
all of the Smashers, Keyblade Wielders, and Party Members must become heroes to the heart, and they introduce 2 girls named after muses, Urania, a girl form Paris, France, and Terpsichore, a girl from Washington, D.C., USA to team up with the Nintendo, SEGA, Capcom, Bandai-Namco, Ubi Soft, RockStar Games, Konami, Activision, The Walt Disney Company, Final Fantasy, and The World Ends With You characters to protect their stages, their worlds, and the homes of Urania and Terpsichore from an evil shadow master.