Someone remade Super Mario 64 with more characters and online play, and quite frankly, it looks insane. Super Mario Online allows 24 people to get online together in a speed running blitz that I'm not even sure looks all that fun. The creators also added Waluigi, Peach, Toad, and Rosalina to the lineup and each character has their own unique ability that helps them in this game.
You can download the game right here, but unfortunately, Google has frozen downloads for the time being so you won't be able to snag it just yet if ever. Check out a trailer for the game below.