Phineas and Ferb Season 1 Episode 18
It's a Mud, Mud, Mud, Mud World
Phineas and Ferb create a monster truck for Candace to practice driving while Dr. Doofenshmirtz tries to find investors for his line of monster trucks that are actual monsters, with a trump card to take down the competition.
Guest Stars
Billy Ray Cyrus
Buck Buckerson (voice)