King Bowser Koopa (大魔王クッパ Daimaō Kuppa "Great Demon King Koopa", in English also Lord Bowser, King Koopa commonly in other media) is the primary antagonist of the Mario series and the archenemy of Mario. He is the leader of the Koopa race. Although Bowser has joined forces with Mario in a few games, he has never ceased to kidnap Princess Peach and attempt to conquer the Mushroom Kingdom since his first appearance in Super Mario Bros..
As the central villain of one of the world's most popular video game franchises, Bowser is easily one of the most recognizable video game villains ever, though he has comic-relief roles in most of the RPGs. Though their origins are unknown, Bowser has eight children; the seven Koopalings and Bowser Jr.
In, the Mushroom Kingdom, everyone is celebrating the Kingdom's Anniversary, and everyone is invited, but Bowser is not amused. He is outside Princess Peach's Castle, and something happened: The Portal appears! Bowser gets angry because he knows something is going to happen and walks towards the Portal. He sees the Shalos and fights them. Mario thinks it has been too much time for Bowser to not be in the celebration and goes outside, he sees the Portal and tells Luigi to come and help him. They help Bowser and when they thought they won, the Portal got bigger and sucked Bowser, Mario and Luigi. Princess Peach was worried and came outside, she was sucked in too.