Looking for Bonnie / The Secret Origin of Supernova

S13 E15: Looking for Bonnie: Famous rock musician Dean Lomax visits Elwood City and calls on George's dad to fix his equally famous guitar, named Bonnie. Legend says that Bonnie is magical, and Buster and George are convinced that just one strum will give them special powers. And during one late night sleepover, they sneak into Dad's workshop to find out if it's true…The Secret Origin of Supernova: Arthur is dismayed when he learns an energy drink endorsed by his favorite comic book character is full of sugar - it doesn't give you any special energy or magic powers at all! Will Arthur be able to find any superheroes who aren't out to make money - or can he create his own?