Eccoli

Eccoli (エッコリ Ekkori, Broccoli in the FUNimation dub) is an anime-only character. He is a chef who competes in the Loguetown cooking competition to win the Blue-Finned Elephant Tuna.

He has what appears to be a large broccoli on his head, hence his name. His Japanese name also sounds like E. coli, a bacteria strain that is commonly found in the lower intestines.