Rover was one of Phineas and Ferb's Big Ideas. It/He stole the molecular splitter Phineas and Ferb rebuilt and took them, along with Isabella, Baljeet, and Buford, on a chase throughout the Danville Street fair until Ferb deactivated while Phineas distracted it/him ("Canderemy").
A recreation of Rover was later used by Phineas to fight the Norm bots sent by the 2nd Dimension Doofenshmirtz to conquer the Tri-State Area (Phineas and Ferb the Movie: Across the 2nd Dimension).
- Rover is the giant robot dog seen in the title sequence.
- Heinz Doofenshmirtz was once shown holding a blueprint for a mechanical dog similar to Rover during the song "Blueprints" ("Phineas and Ferb Interrupted').
|"Phineas and Ferb Interrupted"|
|Phineas and Ferb the Movie: Across the 2nd Dimension|
|"Last Day of Summer"|