Uh, you don't.
Sadly, you cannot unlock him on the ds. he is unlockable on mariokart wii fortunately.
No not in n64,gba,wii,gamcube or ds!
No, but in the Mario Kart DS there is.
ROB is not in Mario Kart Wii, he is only in Mario Kart DS.
Mariokart wii
Hook your DS and your Wii up to Nintendo Wi-Fi.
No But Your Ds Can Connect To Your Wii.
wifi.
If in Mariokart wii, any of the low-class racers (babies) And if in mariokart DS, either luigi or yoshi.
i suppose you would connect the same way like tow ds' or two wii's, but i don't think that you can connect a ds and a wii.
There is no maniac in Mariokart Wii. Check out the characters that you can get by asking this question in the green tab: "What characters can you unlock in Mariokart?"
no