Bowser Jr. (known as Koopa Jr. (Japanese: クッパJr. , Hepburn: Kuppa Junia) in Japan) or sometimes simply Junior, is a video game character who appears in Nintendo's Mario franchise as an antagonist. As his name implies, he is the son of the series' primary and main antagonist, Bowser. Since his debut in Super Mario Sunshine, Bowser Jr. has been a recurring character in the Mario series, and has been made playable in several spin-offs, such as Mario Superstar Baseball, Mario Strikers Charged, and Super Smash Bros. for Nintendo 3DS and Wii U and Super Smash Bros. Ultimate. He wants to do nothing more than his father's will, which is generally to kidnap Princess Peach and defeat Mario.