Wario is one of the many rivals that Mario has ever had in his life. Wario started off as the main villain and final boss in the Game Boy game, Super Mario Land 2: 6 Golden Coins. In this game, Wario takes over Mario’s castle while he’s rescuing Princess Peach, and steals the 6 Golden Coins Mario needs to get back into his castle. Wario soon became playable in the Mario Kart series, starting in Mario Kart 64. He also playable in every Mario Party game and ever Mario sports game. Starting from Mario Tennis, Wario gets a brother Waluigi, to counter Mario’s brother Luigi.