From the Super Mario Wiki
A Donguri Heyho is an enemy in Yoshi's Crafted World. They are Shy Guys that wear an acorn-like hat on their head. Their attack pattern is to roll. They mainly appear in Weighing Acorns, but also appear in the Tin-Can Condor phase of Kamek Kerfuffle, and can be defeated by any means. Additionally, a Donguri Heyho appears on the Spike the Piranha's cinematic, where it calmly walks until the Yoshi eats it to hit the Party Ball with an egg.
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