He is the main antagonist in "Cosmic Defense". He is something like Hamsterville's sidekick. His sidekick is Reuben.
In the begining of "Funny Fun" he was cleaning the ship and then Dr. Hamsterviel called him and said that Elastico and PJ are coming to GENE and he wants Gantu to capture and evillize them. Then Reuben and he betinged that if the plan works Gantu will throw a bowl woth spagetti on Reuben's head and if it doesn't the opposite. However Gene saved Elastico and PJ and Gantu had to feel the spagetti on his head.