Decka

Decka is the best friend of Orb, and he appeared in the episode Fool's Gold. He was kidnapped and put in a cage by Mayor Coleman so he could have an endless supply of gold, but when Mayor Coleman fed him meat he transformed in to his feral form in which caused him to eat everything in sight. Ben as Echo Echo defeat him by letting him eat the echo echos which are made of silicon which his species are allergic to. After he returned to normal, he said that he will never again return to Earth and will tell the others.