Scooby-Doo! Caped Wonders
Return of Commander Cool
S1 E1:
While dressed as his comic book idol, superhero Commander Cool, Shaggy receives a blow on the head and believes he actually is the fictional character. With Scooby as his sidekick, Mellow Mutt, Shaggy and the kids investigate an "alien" who's been sabotaging the Colossal Toy Company, where "Commander Cool" action figures are made.