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

• The baby heads return, but there is an entire dimension full of them.
• The Goozim monster was a bit frightening. And it's implied that it wasn't the first time Doofenshmirtz-2 tried executing someone with it. Speaking of the monster, remember what shape it turned into after it jumped into the portal after Phineas and co.? Most of its body was shaved off, including its limbs.
• A few of the dimensions during the "Brand New Reality" sequence, even if they only flash by for a second, are rather unsettling.
• Doof-2. He rules parallel Danville with an iron fist as a dictator, with an army of Mecha-Mooks (thankfully some relief given that they are based off of Norm) led by a familiar platypus that you now see has turned evil against his own will. Anyone who doesn't conform to his terrible regime will either be taken away by the Normbots or be replaced by a more obedient clone.
  • Even his wife Charlene-2 counts as one in the episode sequel, as she led an army of animal cyborgs (similar to several animal agents from the original dimension) during her husband's reign, as they have all turned evil against their will. Hell, even their daughter Vanessa-2 is very loyal to her family as she formulated a successful escape plan for them in case their reign would be overthrown.
  • The fact that this might have been OUR Doof, had his childhood transpired differently. For whatever reason, a very minute difference between the two was the only real change (Doof-2 lost a beloved toy train as a child while Doof-1 never did) despite all the horrific abuse and neglect Doof-1 suffered and Doof-2 didn't. However, despite Doof-1's incompetence in doing evil, he is smart enough to point out that losing a toy train doesn't constitute a good reason for being evil; he even furiously called this out on Doof-2 by logically pointing out how completely ridiculous that sounds. Needless to say, Doof-2 remains unperturbed by Doof-1's logical argument.
  Doof-1: (hearing Doof-2's backstory) That's..... that it? That's your 'emotionally-scarring' backstory? That's your great tragedy?! Dude, I was raised by ocelots... literally. Disowned by my parents and raised by Central American wild cats, and you're telling me you lost a toy train? That's it?! That's all you got?! Really?!! I had to work as a lawn gnome! I was forced to wear hand-me-up girl's clothes! Neither of my parents showed up for my birth!
• The robot dog Phineas rides during the Robot Riot scene, named Rover in another episode, may look a quite a bit disturbing from certain angles.
• Robot Riot itself. Awesome Music for sure, but to have such aggressive lyrics, (and the song is playing in-universe) shows just how upset the boy who felt bad admitting he didn't like zucchini is during the scene.
• The final battle. With Perry distracted with Platyborg, no Ferb to pull a failsafe out of his pocket and no gadgets to aid him, Phineas is totally alone against a towering madman who wants to kill him.
  • Or turn him, as Doof-2 puts it, into a "boyborg".