Eheh...it's already there. Check the last race of the Special Cup...
Complete the star cup.
You can't, because that track isn't in Mario Kart DS. It is, however, in Mario Kart 7, which was the first game to have retro Rainbow Road tracks.
a race track on mario kart wii
NOTE: it's called Rainbow Road. First, you must go to any Grand Prix mode. After choosing your character and kart or bike, choose the flower cup. Finish it. You will unlock the star cup. Complete that, and you'll get the special cup. Rainbow Road is in that cup.
Its not Super Mario Galaxy.The course is Rainbow Road.
time 1:23 on rainbow road
crash into the rainbow boxes on the road.
Rainbow Road includes some Mario Galaxy aspects, such as star bits. Also if you have a save file on your Wii with Super Mario Galaxy and Mario Kart Wii you can get a character.
No, but there is a Rainbow Road course at the end of each game's Special Cup.
Yes, there is a Special Cup in Mario Kart 7. The tracks are DK Jungle, Rosalina's Ice World, Bowser's Castle and Rainbow Road.
There are nine worlds in New Super Mario Bros. Wii. When you get all of the Star Coins in World One you unlock World Nine Level One and so on. World Nine is like Rainbow Road on Mario Kart.
It's kind of a matter of opinion, but I think Moonview Highway is the hardest. Agreed with the first answer about the matter of opinion, but I think that Rainbow Road is very difficult. (Assuming Mario Kart Wii)
you have to get in 1st place with ALL the modes with the original 4 cups or you can download them from the internet --------Bobby the Brilliant