Get 'gold' in every race/challenge/level.
Try for 'A' instead of C or D level within that 'gold' (as in win every single race in the game)
Beat 150cc.
Just beat 50cc,100cc,150cc and 150cc MIRROR for R.O.B.
You complete all cups by being Mario on 50cc 100cc 150cc and 150cc mirror. Then you will unlock baby Mario
come first in all 150cc cups
Get first place in most of the races.
Ill say Bowser JR on the Hurricane
You must achieve a gold rating on the 150cc Retro Class, on all courses.
You get mirror mode by getting 1st place in all 150cc levels. Win mirror mode special cup to get R.O.B character to play as.
Unlock and complete all circuits in 50cc, 100cc, 150cc and 150cc mirror, complete all missions and unlock all game characters.
Beat 150cc Special Cup.
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)
i don't remeber.but if you have the game beat 150cc answer this qustion.