Phineas and Ferb: Quest for Cool Stuff - Nintendo DS Multiple Gameplay Modes Exploration Mode - Switch on-the-fly between ambitious innovator Phineas and silent, but stoic Man of Action Ferb as they explore an ancient lost temple, underwater caverns and more in search of treasure! Build, upgrade and customize the A.T.T. (All-Terrain Transformatron vehicle), then take it on treasure-seeking adventures around the world. Action Mode - Transform Perry from subdued pet to super Agent P and battle the evil Dr. Doofenshmirtz. Original Storyline - Experience four intertwining episodes filled with witty humor and outlandish adventures.