Inspired by the Disney Channel Original movie, Phineas and Ferb: Across the Second Dimension for Wii, PlayStation 3, and PSP entertainment systems, Phineas and Ferb: Across the 2nd Dimension Essentials allows you to explore and conquer all the new worlds in an action-packed platforming and battling game.

The most popular duo of all time has arrived on PSP to defeat the evil Dr. Doofenshmirtz and save their hometown of Danville. How will they do it? By traveling from one dimension to another, of course!

When Phineas and Ferb accidentally transport themselves – along with Phineas' sister Candace, Dr. Doofenshmirtz, and Perry the Platypus – to an alternate dimension, they embark on a wild adventure that turns their world upside down. After meeting their alternate selves and discovering that Perry is actually the super-secret spy Agent P, they find themselves pursued through space and time by Dr. D's evil alternate self and his army of deadly cyborgs, who are determined to destroy the Tri-State area.

Now, back in Danville – or at least a place that looks a lot like Danville – Phineas and Ferb must use powerful gadgets and a large cast of playable characters if they want to find their way back to their own dimension and save their friends and their town. Join forces with Phineas, Ferb, and Agent P as they battle against the evil Dr. Doofenshmirtz and his forces to save the world.