Super Smash Bros Brawl's take on the Mario Kart series, it's Mario Circuit (Brawl)! Mario Circuit (Brawl) is kinda the stage equivalent of Kellam, because nobody really remembers that it returned. While Smash 4's Mario Kart stages do the thing that the F-Zero stages did, Brawl's Mario Circuit takes place at the center of a figure-8, where Shy Guy racers drive and smack the racers. Also, the stage's Omega mode platform is actually above the regular stage, so that's pretty cool.
Tournament Legality Edit
It's got walkoffs, so BANNED. Not that anybody would notice, anyway.