Super Smash Flash

About

Choose your characters and options and battle it out with 28 different characters in the original title that started it all – Super Smash Flash! This award-winning Super Smash Bros. fangame is complete with Classic Mode, Adventure Mode, and all of the things that make Smash Bros. feel like Smash Bros, with characters and content you’d never expect sprinkled about. Have fun!

Source: IGDB