There is only one cheat and it is not really a cheat. In the beginning of a race when the game is counting down from 3, hold A right after 2, and it will give you a boost.
To get 36 karts on "Mario Kart DS", you have to come in first on every race and cup.
Loads!
Yes.
get a cube
keep playing
go to options then erase data
you have to win trophies on the grand prix cups
You beat all the mirror mode cups.
Nope
They Are Exactly the same cups in the same order as Mario Karts DS
The only cheats are activated with an Action Replay.
Mariokart DS does not have a cheat menu.