American Dragon: Jake Long - Season 1 Episode 7

Professor Rotwood manages to get a blurred photograph of Jake and the Huntsgirl fighting, so naturally he's driven into a frenzy to get concrete evidence. He offers a reward of $500, and Jake takes it up (so they can replace Trixie's parents' anniversary gift that they broke). Ironically, everything he submits (His scales, etc.) is dismissed as fake. However, in their next fight, the Huntsgirl knocks Jake out and Trixie and Spud come across him. They immediately take him to Rotwood and get the money, but when they reach Jake's house and discover pictures of him 'dragoning up' (which was idiotic of him to take) they realize that they have to get him back.