Zack and Cody get angry because everyone in the Tipton is busy (and don't want to play), but, when they go to see Arwin, they see the P.U. (Parallel Universaliser), in where they go to a parallel universe.
Tropes:
- Alternate Universe Reed Richards Is Awesome: The parallel universe's Arwin has a full head of hair, wears leather, is a successful manager for Carey's singing career, and Carrie has a huge crush on him. Naturally when Zack and Cody tell prime Arwin about him, prime Arwin tries desperately to get into the parallel universe.
- Bizarro Universe: The alternate universe the twins end up in is one of these. Every character in this universe is the opposite of their prime selves in some way: Mr. Moseby is a fun-loving rule-breaking cool guy; the hotel is called "The Fitzpatrick" because Maddie is the heiress instead of London; London has Maddie's former job as candy counter girl and is the smart one while Maddie is The Ditz; Carey is a famous singer and lets the boys do everything they want; Esteban is a maid; George Clooney is on the nickel; and Arwin is Carey's manager has hair, wears leather, and Carey has a massive crush on him instead of vice versa.
- Dimensional Traveler: The episode deals with the twins traveling to another dimension thanks to Arwin's invention.
- Dumb Blonde: The episode features an alternate reality where Maddie's and London's roles are swapped, with Maddie being the hotel heiress and London being the candy counter girl. While in the main universe, Maddie inverts this trope by being highly intelligent and competent, in the alternate universe, this trope is played straight with Maddie, so much that she makes the main series' London look like a genius.
- Five-Second Foreshadowing: Just a bit before the twins get confirmation that they are actually in a parallel universe, and before they find out about parallel universe Maddie being a hotel heiress, the audience can see that the usual "T" logos that represent the Tipton hotel line logo have been replaced with "F" logos, for "Fitzpatrick."
- Maybe Magic, Maybe Mundane: It's never exactly stated whenever or not the twins traveled to a parallel universe, though the end with their mom picking up the quarter of George Clooney does indicate they did travel.
- Or Was It a Dream?: When Zack and Cody tell everyone else about their adventures in the parallel universe, everyone else dismisses it as being just a dream, but at the end of the episode, Carey finds a nickel with George Clooney on the back.
- Shared Dream: Discussed. Cody argues that the experience could not have been a dream because both he and Zack wouldn't be able to dream the same exact thing. Carey says that shared dreams between twins have been known to happen. The two of them start to think that maybe they did dream the whole thing, but then Carey finds the quarter with George Clooney on the front, indicating it was real.
- Tempting Fate:Cody: Could this get any weirder?Female!Esteban: (enters) Maid service!Zack: That would be a yes!
- Wanting Is Better Than Having: At the beginning of the story, Zack and Cody are convinced their lives would be easier if the world was more fun-orientated. The P.U. grants them one such world. But after a short stay there, the boys realize it's not nearly as much fun living there because their mother gives no boundaries and (by that extent) no indication she legitimately cares about their well-being. As such, they're very relieved once they make it home to their original world.
