Rainbow Road is a stage appearing in Super Smash Bros. for Nintendo 3DS. It is based on Rainbow Road from the Mario Kart series, specifically the one of Mario Kart 7 which is on the Nintendo 3DS. It was first seen in the Rosalina & Luma trailer.
The stage is similar to stages like Mute City. You begin at the start of the track and then fight in platforms, which will differ each time, while travelling through the track, which is almost exactly like the one in Mario Kart 7. When landing on the track you have to watch out for incoming Shy Guys in karts, as they will damage you just like in the Mario Circuit stage.
Rosalina & Luma Trailer
Kirby was flying on a Warp Star towards Rainbow Road. Meanwhile in the track itself, Mario, Luigi, Peach, Bowser and Donkey Kong were racing against each other when suddenly Kirby dashes pass them. However a blue orb is shot away from a distance hitting Kirby in the process. Kirby crashed down on the stage, and the incoming racers stop in front of them. Shortly afterwards Luma arrives and examines Kirby, who does the same to the Luma. Then Rosalina appears and takes Luma in her arms. Rosalina then lets Kirby play with Luma afterwards.
Rainbow Road first appeared in Super Mario Kart, and has appeared in every Mario Kart game since. This Rainbow Road is based on the 3DS version from Mario Kart 7. Shy Guy appears as a racer within the game, although was used in Mario Kart DS in the downloadable multiplayer. The kart driven by the Shy Guys is the Standard kart from Mario Kart 7.
- The Rainbow Road in the CGI portion of the Rosalina and Luma trailer is not the same model of the track as the one in the actual stage. (Or any other Rainbow Road in the Mario Kart series)