Mario Kart
Blue Thunder: A thunderbolt that affects only the leading racer.
Rainbow Spiny Shell: It flies across, to a random racer, and makes a large rainbow explosion!
Koopa: It runs around randomly when deployed.
Original Mario games
Coin Leaf: It turns you into a tanooki form, and automatically adds to your coin count when in use.
Koopa Powerup: Turns you into a Koopa for a limited amount of time. Enemies mistake you as a real Koopa. It lasts for 10 seconds.
4.5/5, depend on how common or rare you get the power-up
Quick-work: This power up literally pauses time. It allows the user to move freely, uneffected by the time freeze, in a attempt to completely clear as many enemies on screen before the power up wears off. When it does, any harmed take the amount off damage taken during the time freeze and continue fighting, not knowing what has happend. If they've taken maximum damage, they die the second it wears off. It only last for 10 seconds and only shows up when there are too many enemies on screen or if the player is in peril.
3rd-person adventure
I wanna advance ahead of the game, but I'm stuck patrolling this darn platform!!!
4/5
An item that boosts the likelihood of one finding rare items. Kind of like a lucky charm of sorts. Really helpful when finding valuable items, but not necessarily giving them to you.