Jerky Jasper is an imaginary friend Uncle Grandpa brought to life to meet after being made up by Pizza Steve as seen in the episode Jerky Jasper. He is voiced by Eric Bauza.
Jerky Jasper is an imaginary friend that was created by mention of Pizza Steve and physically manifested by Uncle Grandpa. Jerky Jasper is a purple creature with bat wings on his head and has a green nose. He's very muscular and has a catfish that wears shades for an arm, he wears a purple tank top with his initials, a purple and gold belt with purple pants. He also has tank tracks for feet.
Jerky Jasper is a very destructive creature and hates to see his name soiled by Pizza Steve, he vows to get revenge by destroying all of Pizza Steve's things as well as beating Pizza Steve up himself. He shows sympathy for his creator Uncle Grandpa as he doesn't think it's fair for Uncle Grandpa to be lied to by Pizza Steve. He also has a high tempered attitude as he was very angry at Pizza Steve.
Despite Pizza Steve saying he was his imaginary friend, Uncle Grandpa actually created Jerky Jasper.