Mario - None
Luigi - (Good) His wardrobe appears and he wears each one of the dresses and everyone around shrinks.
Peach - (Good) She attracks everyone and immobilizes everyone around (that wouldnt happen, she doesnt look that good.) She smiles and makes the person in front of her shrink.
Yoshi - None
Wario - (bad) He breaks down when he gets hit 10 times. He can still move but cant drift and move slower.
Waluigi - (Good) (Item Exclusive) - Instead of getting a tanooki tail he gets a tennis racket. Tennis Racket is longer.
Baby Mario - None
Baby Peach - Same as peach
Toad - (Neither) He gets a golden mushroom but after it is finished he gets dizzy.
Koopa Troopa - None
Koopa Paratroopa - (good) P-Wing, flies to first place
Donkey Kong - (good) 30 Bananas for the second lap. But the bananas disappear when the 3rd lap is entered. And same as wario.
Bowser - good - breathes fire of course -_- And same as wario
Daisy - *if i told i would die* - Says "Hi Im Daisy" and i guess you could tell what happens.
Birdo - same as yoshi
Diddy Kong - Same as Donkey Kong (not including warios power)
Bowser Jr. - Same as Bowser. (not including warios power)
Baby Luigi - Same as Luigi
Baby Daisy - Same as Daisy
Toadette - Same as Toad
Dry Bones - (Good) - Throws 3 Bones every 8 seconds.
King Boo - (Good) - Turns invisible and invincible but cannot hit anyone,
Rosalina - (Good) - The Power of the luma and the powers stars come down from the cosmos to protect her from everysingle attack. It even protects he from falling.
Mii - None
Pianta - (bad)After 10 hits they break down and cant drift and move slower. If in their tree kart, their trees break off and they have no choice but to use their emergency tree which powers the drift boost in their kart, thus making them unable to drift.
Il Piantisimo - (good/bad) For the second lap he simply races to the 3rd. He hops out of his kart but will be sent back to his kart which is slowly moving to the 3rd lap. If he reaches the 3rd lap the kart is teleported to where he is.
Special Abilities should be only available to use on the 2nd lap (to prevent a.) a very good start where everyone is a mile away. b.) destroying everyone when your on the 3rd lap so they cant get 1st). Bad special abilities only happen on the 2nd lap but their effects last until the very end.