Phineas and Ferb the Movie: Across the 2nd Dimension

Phineas and Ferb the Movie: Across the 2nd Dimension follows the titular duo as they accidentally discover Dr. Doofenshmirtz's latest invention and are transported to an alternate dimension where an evil version of Dr. Doofenshmirtz rules. Together with their friends and Perry the Platypus, they must find a way back home while thwarting the nefarious plans of the alternate Dr. Doofenshmirtz.