GeneBernardinoLawl's AGK series
He was giving the fan name of "Kervin Neinatterson". He first appeared on the episode "How AGK get the super keypower". Which is after Sasha shoot him to his right cheek on "Crazy Ukrainian Kid vs. Angry Sulu Kid".
It revealed that he has a rabbit teeth due to his mother is a bunny.
Silver panther 2000's AGK series
So far in silver Panther 2000's AGK series, Kervin Neinatterson is one of Leopold's neighbors that lives with his mother and father. So far, Kervin made a cameo appearance in the episode 2. Kervin will make a official appearance on episode 7.