Here's a list of the items starting from top to bottom.

Blue Spiny Shell(one of the most hated items in Mario Kart games)

Super Mushroom

Gold Mushroom

Green Shell

Red Shell

Banana Peel

Coin

Boomerang Flower

Fire Flower

Mega Horn(I think that's the name)

Piranha Plant

Starman

Blooper

Lightning(I HATE THIS ITEM MORE THAN THE BLUE SHELL)

Bullet Bill