Lucky Seven

The Lucky Seven is an item introduced in Mario Kart 7. As the name implies, it gives the player seven items that orbit the kart: the Green Shell, Red Shell, Banana, Bob-omb, Mushroom, Star, and Blooper. Its successor, the Crazy Eight, has a similar function to the Lucky Seven, only it adds an extra item to the mix.

Koopa Kart series
The Lucky Seven is an item featured in the Koopa Kart series in Koopa Kart 7 and Koopa Kart Tour. It can be obtained from 5th to 8th place. It functions similarly to how it does in Mario Kart 7, except the items line up behind the kart, allowing the player to switch between which item they want to use with the D-Pad.