Cheeseburgers for Diddy Kong

When cheeseburgers disappear from all the fast food places, Phineas and Ferb make their own brand of burgers. They must do it fast, before Diddy Kong has a fit. Meanwhile, Doofenshmirtz finally gets a Spartan army.

Episode Summary
Diddy Kong's stomach growls. Mario realizes he's hungry. Diddy Kong tells Mario to go to MickeyDuck's to get a burger. Phineas and Ferb are busy playing Mario Kart 7. Then, Mario comes back with bad news. All the cheeseburgers in Danville are gone! Phineas suggests to make their very own unique burger. Then, the Perry line. Monogram tells Perry that Doofenshmirtz is trying to get a Spartan army again. Perry heads out in his hovercraft. Phineas and Ferb are busy making hamburgers. Then, Isabella comes. Phineas says hi and Isabella says her catchphrase. Diddy Kong is complaining to Donkey Kong about how he'll never get a bite to eat. Donkey Kong tells Diddy Kong to be patient. Isabella wonders what's wrong with Diddy Kong. Phineas explains his dilema. Isabella understnads. Meanwhile, with Perry, he encounters some Spartans. Doofenshmirtz apporaches with his army. Doofenshmirtz tells Perry he can't do an Inator today because he needs to go terrorize the Tri-State Area. Him and his Spartans trap Perry and leave. Perry struggles to get out. Meanwhile, Phineas and Ferb's cheeseburger is getting completed. Diddy Kong is flooding the backyard in drool. Isabella thinks it's gross she's standing in monkey drool. Donkey Kong looks at Isabella offended. Isabella apoligizes. Then, Phineas and Ferb say another 10 minutes and the burger will be done. A bomb of saliva explodes in the backyard. Isabella's eyelids droop in anger. She dries out her hair and bow. 10 minutes pass by, and Isabella and Donkey Kong are covered in drool. Donkey Kong mentions to Isabella her bow is drooping. Isabella doesn't care. Phineas and Ferb present the burger to Diddy Kong. Diddy Kong is about to take a bite when suddenly the burger is ripped out of his hands. A Spartan gobbles it down. Diddy Kong is furious. But then, a platypus comes. He defeats the Spartans and a pharmacist. Perry turns back to normal. Donkey Kong tells him he should've eaten a banana this whole time.