Blue Shell (Super Mario World)

The Blue Shell is a Unique item in Super Mario World.

Appearance
It has a blue back with a hole on the bottom of the shell for a koopa to fit in.

Trivia

 * This item isn't something Mario/Luigi can absorb.
 * If Yoshi eats this then Yoshi will sprout wings and then have the ability to fly.
 * The Blue shell is a rare item.