action replay
Yes. Action Replay codes are interchangeable between the DS and the DSi, because they both use the same games.
You cannot normally play in 500cc. If you want to do so, you'll have to get an Action Replay and use a code for it.
there IS not a code to play as Mario
Obviously you put on too... ...too... ...too big codes on eg: drive through walls
yes, there are hundreds of cheats for Mario kart. such as unlock all characters, cars,and classics, play as shy guy in single player,and much more! to get the codes you must go to www.codejunkies.com. *note* to enter the codes you need the action replay.
You can't play as him WITHOUT an Action Replay for the GameCube. But, with one, and you can.
yes
No but there is some for items and levels
you can't unless there is an action replay code for it. The only ones i can think of that you can play as are Mario and luigi.
There is no Mario Kart 7 demo that you can play on the Nintendo eShop
you can't, but if you have a action replay code, you can