From the Super Mario Wiki
Zombie Debuho are enemies in Yoshi's Crafted World. They are an undead variant of Fat Guys and a larger variant of Zombie Guys. They appear only in the level Haunted Maker Mansion, alongside Zombie Guys. Most of them are stationary, sitting in large couches throughout the mansions. Otherwise, they strut about outside. Like Fat Guys, they cannot be defeated by a jump, but can be defeated by a Ground Pound. Yoshi can also eat them to get a full stock of eggs. Most of the time, if Yoshi eats a Zombie Debuho sitting on a couch, the couch moves, revealing a secret.