After hearing about Doofenshmirtz joining an strange fighting tournament, Major Monogram has sent the best agent on his organitation, Agent P (also known as Perry the Platypus) to stop Doof on whatever he's... Doofin'.
Fun Fact: Perry the Platypus was originally going to be Dr. Doof's Assist Trophy instead of Norm (and his rival was going to be another scientist, though I didn't thought about who should that be), but after watching RegularDude's take on Agent P's moveset, I thought it was SO bad and SO unfaithful, I had to make him justice. RD's moveset is currently removed from Youtube.
Music: -Perry the Platypus - Phineas and Ferb: https://www.youtube.com/watch?v=AsYREFwxYFI -Clash of the Titans - Phineas and Ferb: Across the 2nd Dimension (Videogame): https://www.youtube.com/watch?v=IEvzXNRrQa8
All clips belong to their respective owners.