Spider-Man, Iron Man, Thor and Hulk stand powerless after being struck by Dr. Doofenshmirtz's power-draining "inator." Once the Marvel Super Villains - Red Skull, Whiplash, Venom and M.O.D.O.K. - find out that Dr. Doofenshmirtz is responsible for robbing the Super Heroes of their powers, they seek him out and together create mayhem in Danville. Meanwhile, Phineas and Ferb do everything they can to restore the Super Heroes' powers before the evil villains take over the world.
"Aunt May, Phineas and Ferb are making a crossover!"
Hulk has lost his strength
Spider Man lost his powers
"Ferb, I know what we're gonna do today! Hehehehehe!!"
"Is he some kind of super-platypus with super-platypus powers?"
Isabella giving Iron Man a juice box.
Ding dong. Avengers calling.
Doofenshmirtz with MODOK and Red Skull
The heroes confront the villains
Venom, Modok, Whiplash, Red Skull and Doof do all sorts of evil around Danville
Doof and Red Skull in a ballpit?
Spider-Man, Spider-Man, does whatever a spider can.
MODOK, Venom, Whiplash, Red Skull and Doof marching and stomping on a flower bed.
Phineas space surfing in the opening.
Isabella and Phineas holding hands.
It's a bird! It's a plane! It's a platypus!
Phineas and Ferb Mission Marvel
Candace Cheer's to the Superheros
Candace gets upset, and Phineas in Mad that he pointed her to the door to get out
Candace faints after seeing Ducky Momo in the Costume; Isabella catches Candace as she faints
nick fury & Monogram Warning Agent P
Super Heroes Rescued by Perry The Playtpus
Doofenshmirtz attacking from his building