I think this should have items, obviously not mariokart items.
Ok here are my ideas.
Shell = Rocket
Triple Shell = Triple Rockets
Red Shell = Homing Missile
Triple Red Shell = X3 Homing Missile
Mushroom = Booster
Triple Shroom = Longer lasting Booster
Golden Shroom = Temporary Unlimited Use Standard booster
Banana = Oil slick
Bomb = Cluster Bomb
Star = Star (We can use Star_Blocko.ogg)
Here are some non Mario Kart Inspired ones:
*New* Force Field (Self Explanatory)
*New* Magna-tract (Gives you a cursor that locks onto the back of a player and then you can "attract" yourself closer to the vehicle)
*New* Warp (Turns your car invisible, gives you a speed boost, and then makes you visible after a set amount of time)
*New* Jump (Your car jumps the height of one other car)
Bonus points if you know the game their from.
No blue shell because everyone hates it.