YMMV / Phineas and Ferb The Movie: Across the 2nd Dimension

• Alternate Self Shipping: Some fans were quick to ship the 1st and 2nd dimension counterparts with each other after the film's release. Particularly Doof/Doof-2 and Candace/Candace-2.
• Alternative Character Interpretation: Did Doofenshmirtz-2 really turn evil because he lost that toy train? Or did he have a past so unbelievably traumatic that he blocked it out, and funnels all those negative emotions into the loss of his beloved childhood toy? Or was he a horrible person even as a kid and is just using the train as an excuse?
• Ass Pull: The issue of Perry's cover being blown is resolved with the use of Doofenshmirtz's Amnesia-inator, an invention that had never been shown or alluded to until the end of the movie. This is, of course, the entire point of the joke.
  Doofenshmirtz: I never built an Amnesia-inator... I certainly would've remembered doing something like that!
• Big-Lipped Alligator Moment: The song "Brand New Best Friend", sung by Doof and his 2nd Dimension counterpart. As entertaining as it is, it still fits the criteria for this trope since it comes out of nowhere and is never mentioned again afterwards.
• Broken Base:
  • Phineas' characterization in the movie proved to be divisive. Phineas is almost never upset or angry (GET ON THE TRIKE!! notwithstanding); here, he's mad at Perry for half the movie's run time. It's presented as O.O.C. Is Serious Business (he believes his entire bond with his beloved pet was a lie), but to some fans, it came across as cruel, unwarranted, and thoroughly un-Phineas-like. Others though, enjoy seeing another side of Phineas and argue that he is in the right for being upset at Perry (especially given that he doesn’t understand why Perry hid his secret from them until the ending), and that he does eventually forgive him and become more like himself.
  • The ending (which essentially wipes away the memories of the cast of the film's events) is divisive. Some are okay with it and feel it was a Foregone Conclusion given the show actively embraces Status Quo Is God, while others are disappointed that it prevents future storytelling possibilities, as it means Phineas and Ferb won't get to go on adventures with Perry and that Phineas won't remember that Isabella kissed him. Although the last episode throws a lampshade for the latter.
• Ensemble Dark Horse: Of all the 2nd dimension characters, Candace-2 is the most loved. No surprise if you consider that she is a badass Action Girl and just about everything she does is a moment of awesome.
• Evil Is Cool:
  • 2nd Dimension Doofenshmirtz. Unlike his 1st dimension counterpart, he's far more competent and evil, actually succeeding in taking over and ruling the Tri-State Area for five years with an army of Norm-bots, while wearing an Eyepatch of Power. However, just like his counterpart, he can still be quite fun and humorous from time to time.
  • Perry the Platyborg is this in spades, being a brainwashed Cyborg version of everyone's favorite platypus, as well as a threatening Implacable Man and general of Doof-2's army.
• Fan Nickname: Because the title of the film is a mouthful, it is often shortened to just "AT2D".
• Fanfic Fuel:
  • The 2nd dimension is rife with this. What was the 2nd dimension like before Doof-2 took over? What are the other 2nd dimension characters, such as Stacy and Jeremy like? How do the 2nd dimension counterparts readjust after Doof loses? While the sequel episode does answer some of these questions, others remain more vague.
  • What if the characters never got their memories wiped out in the ending or what if they regain their memories sometime after. A particular plot fans like to explore is how would Phineas react to being kissed by Isabella.
• Fanon Discontinuity: In fanfic-writing circles, it's not uncommon for the ending to be reversed or flat-out ignored. It isn't that people don't like it (though plenty of fans didn't), but that its Reset Button ending keeps them from exploring so many interesting ideas and premises.
• Fan-Preferred Cut Content:
  • Despite the song and the scene being completely finished, Candace's song, "Mysterious Force" was cut from the final film due to time. However, a good number of fans wish the song was kept in, if only because the song is an absolute banger.
  • There was going to be a few scenes with both original and parallel Vanessa, but they had to cut them out due to timing. You can watch said deleted scenes on the DVD. Alleviated in the sequel episode, in which a major part of the episode continues off of parallel Vanessa's missing scene.
• Genius Bonus:
  • Or, perhaps, Liberal Arts Major Bonus - Norm's "Get me! I'm a Georgia O'Keeffe painting!"
  • Ornithorhynchus anatinus, the scientific name of the platypus, is among the lyrics of "Everything's Better with Perry".
  • Existentialism trading cards! "I'll trade you two Kafkas for a Dostoevsky." From Buford!
• Most Wonderful Sound: Isabella finally planting one on Phineas.
• Memetic Mutation: "Wow, if I had a nickel for every [X], I'd have two nickels, which isn't a lot, but it's weird that it happened twice." ^Explanation Doofenshmirtz's remark about how he was doomed by a puppet twice is often used as a snowclone to compare two events with bizarrely specific similarities.
• Play-Along Meme: Doofenshmirtz-2's Freudian Excuse is deliberately as shallow as possible, but fans have taken to jokingly acting as though him losing his toy train is the most tragic backstory in the world, even more than Doofenshmirtz's own Hilariously Abusive Childhood.
• They Wasted a Perfectly Good Character: Ferb's role is pretty downplayed, and he doesn't really respond to the fact that Perry has (to their information) betrayed him just as much as Phineas. Similarly, he doesn't do much in the final battle, showing up after everything is already done.

---