A load of useful unlockable 4 seriouse racers who want to win

Unlockable:	How to unlock:
waluigi to be a playable character	Complete the 100cc Retro Grand Prix cups with a rank of A or higher to have Waluigi selectable
Unlock Daisy	Complete the 50cc Nitro Grand Prix cups with a rank of A or higher
Unlock 3 choice karts	Complete the 50cc Retro Grand Prix cups with a rank of A or higher
Unlock Dry Bones	Complete the 100cc Nitro Grand Prix cups with a rank of A or higher to have Dry Bones selectable as a racer
Select 7 karts	Complete the 150cc Retro Grand Prix cups with a rank of A or higher to select among 7 karts
Select among all karts	Complete the Retro Class Grand Prix cups with a rank of A or higher to select all the karts for any character
Unlock R.O.B	Complete the Mirror Class Nitro Grand Prix cups with a rank of A or higher to have R.O.B selectable
Unlock the Mirror Class Cups	Complete the 150cc Nitro Grand Prix cups with a rank of A or higher to unlockt he Mirror class set