Emperor Grog

Emperor Grog first appeared in "Godfellas" and attacked the Planet Express ship and its crew with his fellow Space Pirates. Unfortunately, he was killed in the explosion of his own ship due to Bender crashing right through it. He mentions that he has.

He later appeared on a barrel of Space Grog in "Möbius Dick", where his name was finally learnt.

Trivia

 * Grog's skin colour is light blue in his first appearance, yet on the barrel of Space Grog in his second appearance it is green.