Ah, Phineas and Ferb, the TV show made for kids that's charming the pants off of everyone.
We've seen Doofenshmertz's suggestions for how to play Phineas and Ferb: Across the Second Dimension. Now it's Major Monogram's turn to assist O.W.C.A Agents who find themselves in "various alternate dimensions in which the entire tri-state area has been taken over by random stuff and you are in possession of unspeakable powers". He's even commissioned a song about it.
For those familiar with the Phineas and Ferb television show, this trailer is familiar territory. For those unfamiliar with the show... what are you doing with your life? The video game is based on the made-for-TV movie of the same title, and both are equally funny. Really, try not to laugh while watching this trailer. It's good, clean fun for kids of all ages.