Dan Povenmire and Jeff Swampy Marsh - Creators/Executive producers of Phineas and Ferb; Dan voices Dr. Doofenshmirtz and Swampy voices Major Monogram\r<br>\r<br>Dan and Swampy discuss their favorite -inators\r<br>\r<br>(C) Disneys Phineas and Ferb: Mission Marvel Premieres August 16 at 8 p.m. on Disney Channel. Used with permission.
