Phineas and Ferb the Movie: Across the 2nd Dimension (2011)

Perry's worst fear comes true when Phineas and Ferb finds out that he is in fact Secret Agent P, but that soon pales in comparison during a trip to the 2nd dimension where Perry finds out that Dr. Doofenshmirtz is truly evil and successful.

The 7th DimensionThe Adventures of Buckaroo Banzai Across the 8th DimensionBeethoven's 2ndHighlander III: The Final DimensionParanormal Activity: The Ghost DimensionThe Proud Family MovieAdventures of Louanna Lee: The MovieThe 2ndPhineas and Ferb the Movie: Candace Against the UniverseRiverdance: The Animated Adventure