Unlockables

Dry Bones
Finish in first place in the 50cc Special Cup

Daisy
Finish in first place in the 50cc Lighting Cup

Extra Kart
Finish in first place in the 100cc Special Cup to unlock an extra kart for every character

Waluigi
Finish in first place in the 100cc Lighting Cup

4 More Karts For All
Finish first in the 150cc Special or Lighting Cup to get a total of 7 karts for every character. If you skipped the 100cc Special Cup you'll unlock the third kart instead

150cc Mirror Class
Finish first in both 150cc Special and Lighting Cups

R.O.B
Finish First in the 150cc Mirror class Special Cup

Have All Characters Use Any Kart
Finish first in 150cc Mirror Cloass Lighting Cup

Alternative Title Screen
Finish first in every cup

Baby Mario
Finish every race in first place with Mario