I was inspired by the Star Wars crossover episode, and I really wish that the series hadn't ended so soon. As you can see, both Perry the Platypus and Dr. Doofenshmirtz are in the world of Pirates of the Caribbean, and one of them is cursed! I bet you're wondering why Doof still has his pointy nose. Well have you seen Barbosa under the moonlight?
Phineas and Ferb and Pirates of the Caribbean: The Curse of the Black Pearl (c) Disney