Jeff Swampy Marsh played his main role as Major Monagram.
Vincent Martella does the voice of Phineas.
Phineas and Ferb was created by Dan Povenmire and Jeff "Swampy" Marsh.
Phineas and Ferb was created by Dan Povenmire and Jeff "Swampy" Marsh.
jeff (swampy) marsh
Dan Povenmire and Jeff "Swampy" Marsh created Phineas and Ferb
Dan Povenmire and Jeff 'Swampy' Marsh are the directors for "Phineas and Ferb".
Jeff "Swampy" Marsh is the voice of Major Monagram on Phineas and Ferb.
Dan Povenmire and Jeff "Swampy" Marsh
Jeff "Swampy" Marsh
Dan Povenmire and Jeff "Swampy" Marsh
Dan Povenmire and Jeff 'Swampy' Marsh
Dan Povenmire and Jeff "Swampy" Marsh.