Bowser Jr. (known as Koopa Jr. (クッパJr., Kuppa Junia) in Japan) is a video game character who appears in Nintendo's Mario franchise as an antagonist. He is the son of the series' main antagonist, Bowser. Since his debut in Super Mario Sunshine in 2002, 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 among many others. He often helps his father to kidnap Princess Peach and defeat Mario, but in the end wants nothing more than to impress his father. Bowser Jr.’s defining traits are his striking resemblance to his father, his energetic and driven personality, his expertise in mechanics and technol