Phineas and Ferb build a machine to teleport you anywhere in the world, and Baljeet suggests they go underwater, so they can discover some other undersea citys. Candace follows them, in an attempt to bust them. They end in Bikini Bottom, where they run into Spongebob, Patrick ,and Squidward. They soon make friends with eachother, and Spongebob invites them to the Krusty Krab. When the boys see how rundown the place is, they offer to help renovate it. But little do they know, Mr Krabs has banned renovations, not only because of past events,but also to save money. Squidward sees this as his opening, and teams up with Candace to get them in trouble with Mr K, and Bust them