Tube Guy in front of Blue Yoshi and Baby Donkey Kong.
Tube Guys (also called Toober Guys) are enemies in Yoshi's Island DS. It's a Shy Guy that wears a red, green, orange, or purple innertube.
Tube Guys appear in aquatic levels where they float on water. Otherwise, they're like standard Shy Guys. They also appear during the Bessie Bass boss fight.