Mario Kart DS - DS

Play as Daisy:
Win a Gold trophy on all cups in the Retro Grand Prix in the 50cc class.

Play as Dry Bones:
Win a Gold trophy on all cups in the Nitro Grand Prix in the 50cc class.

Play as Waluigi:
Win a Gold trophy on all cups in the Retro Grand Prix in the 100cc class.

Play as Shy Guy:
Play a Download Play game against another player. Shy Guy can only be used Download Play mode.

Bonus karts:
Win a Gold trophy on all cups in the Nitro Grand Prix (100cc class) to unlock a third kart for all characters. Win a Gold trophy in all cups in the Nitro Grand Prix ( 150cc class) to unlock a total of seven karts for all characters.

Unlock Mission 7:
To unlock the 7th mission in mission mode, get at least a 1-star ranking on all levels in Missions 1-6.

Unlock R.O.B.:
Finish 150cc Mirror Mode Nitro Class with Gold Trophies on all cups to unlock R.O.B. as a racer.

Staff Ghosts!:
Come within 5 seconds of a Staff time on a track, and you'll unlock that ghost to compete against.