One of the major bosses in the game, Burt the Ball is created by Kamek when him and Baby Bowser see Yoshi near some icy water.
While it's unclear if he's really Burt the Bashful from the first game in some reincarnation, but he should be familiar to most fans.
You basically fight on a floating platform. Trying to avoid Burt while staying away from the water isn't too easy.
Especially when he starts to get mad and tries some tricks up his sleeve, well...if he actually had sleeves...or a shirt.
After some stomps, Burt will be gone for good.
When Burt is defeated, the Yoshis get the yellow dream gem to take back to the island.
Only two more left to go.