Decka

Decka is the best friend of Orb and he appeared in the episode Fool's Gold.

Decka 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 primal form in which caused him to eat everything in sight. Echo Echo defeated him by letting him eat the Echo Echos which are made of silicon which his species can not eat because it is poisonous to them. After he returned to normal, he said that he will never again return to Earth and will tell the others so they won't come back either. He is also shown to have a bad temper and gets frightened easily. For health reasons, his species also cannot eat some heavy metals, lanthanides, fluorine or chicken nuggets.

Appearences
Ben 10: Alien Force
 * Fool's Gold

Trivia

 * His name may be a reference to Deca which means 10. This may mean he is the thenth of the aliens on the popcorn festival.