Almost anyone who was a child or liked cartoons from 2007 to 2015 knows of the iconic red- and green-haired stepbrothers Phineas and Ferb — and their secret crime-fighting pet Perry the Platypus.

To celebrate, creators Dan Povenmire and Jeff "Swampy" Marsh visited Mashable for a Say More interview, which dove into the trials of the show's creation, the hilarity behind their platypus ...