You can't unlock Petey Piranha in Mario Kart DS. It is myth character, and you could probably only obtain him if you sprite hacked and made some manual changes on the game. The four chanarcters which you can unlock on Mario Kart DS are Daisy, Dry Bones, Waluigi, and R.O.B. You can also obtain Shy Guy from hacks.
No, he is not. I don't think he will ever be in a Mario Kart game.
Go on this site and it tells you how to: http://gameolosophy.com/games/gaming-on-the-go/
you have to go back and battle Petey Piranha but with a mini mushroom
Todette and Koopa Troopa are not unlockable characters in Mario kart DS. To unlock R.O.B on the other hand, you have to obtain a gold trophy on every cup, including Mirror Mode(which is unlocked by getting gold trophies on all the other cups 50cc-150cc)
hes not in Mario kart ds or in Mario kart wii but in ds its hard
Yes there is Mario kart for ds. It is called Mario Kart DS. You should buy it immediately.
No, you cannot connect Mario kart ds to Mario kart wii.
Mario Kart DS happened in 2005.
you can't do trick in Mario kart ds
You cannot get bikes in Mario Kart DS