The term SUPER SMASH BROS. is a Nintendo game that was first released in 1999. It is a fighting game featuring characters from various Nintendo franchises, such as Mario, Donkey Kong, and The Legend of Zelda. Players can battle each other in a variety of arenas and use special moves to defeat their opponents. The game has spawned numerous sequels and spin-offs, and remains one of the most popular Nintendo games of all time.