Kingdom Smash Brothers: The Ultimate Showdown is a Japanese-American action role-playing video game developed by Square-Enix, Nintendo, SEGA, Capcom, Bandai-Namco, UbiSoft, RockStar Games, Konami, Activision, and The Walt Disney Company.
When three extra characters are added into the Super Smash Bros universe (Sora, Ness, Pit), they just learned that all of the 24 characters will have to fight. They go through rough training and through strict tasks called Courses. A tournament consists of 6 games, containing 4 characters each with 10 lives. It continues until there is a winner.