History NightmareFuel / TheManyDatesOfDannyFenton

* The synthodrones invading Danny's home, replacing his family. After a long trip with his love, Danny expects to find his parents and tell them about Danielle, only to discover these inhuman things. Even worse is how similar they were that, if this were visual, would border on UncannyValley.

* Tinker's leg injury is a large chunk of AdultFear. Though an accident, the idea of your youngest child getting harmed by your oldest, or in Katie's case hurting her little brother, is terrifying. It was enough for Katie to recognize what she just did and it haunted her a long time.

** Danny being the object of Katie's desires is treated comically, but in hindsight it's rather terrifying. Katie is highly unaware of how monstrous she is when she transforms, being so tough that Danny did not such harm to her and so, when he encounters her again at the carnival, he's found himself suffocated by her. He even has a nightmare of being married to her, one against his will, and soon finds himself fathering 8 children, all of them with her powers and he becomes essentially a slave to Katie, who runs him ragged and makes him both work ''and'' take care of the house and children by himself. It's so bad that he is obviously in full StockholmSyndrome by the time their youngest child is 3 and [[BreakTheCutie his spirit has long since been crushed unknowingly by Katie]], who is blissfully unaware and acts as though they are HappilyMarried. Spin-offs reveal Danny never opened up about his nightmare, and for good reason.

* Thanatos, the self-proclaimed god of death. His first proper appearance involved him killing off all of Lorwardia, only for a vengeful Val-Yor to try to do him in for attacking his homeworld. Last Val-Yor is seen, a NeckSnap occurs. The next chapter confirms his end. Following that, Thanatos also ends Ma Vreedle's life from blasting her on the inside, and ends his first night on Earth wiping out most of Quahog. His ultimate plan is to murder Kim Possible in front of Danny Phantom and procure himself the power to become a deity. [[spoiler: Even more horrifying is that he's [[CanonCharacterAllAlong revealed to be Dark Danny]] under that armor, trying to reinsert himself in the timeline. Just the idea that Danny still could've have become such a horrid monster was no doubt something that [[EvilMeScaresMe haunted him]]. He's fortunate he used the same power Dark Danny wanted to restore all the damage he caused.]]

** Danny being the object of Katie's desires is treated comically, but in hindsight it's rather terrifying. Katie is highly unaware of how monstrous she is when she transforms, being so tough that Danny did not such harm to her and so, when he encounters her again at the carnival, he's found himself suffocated by her. He even has a nightmare of being married to her, one against his will, and soon finds himself fathering 8 children, all of them with her powers. Spin-offs reveal Danny never opened up about his nightmare, and for good reason.

* Thanatos, the self-proclaimed god of death. His first proper appearance involved him killing off all of Lorwardia, only for a vengeful Val-Yor to try to do him in for attacking his homeworld. Last Val-Yor is seen, a NeckSnap occurs. The next chapter confirms his end. Following that, Thanatos also ends Ma Vreedle's life from blasting her on the inside, and ends his first night on Earth wiping out most of Quahog. His ultimate plan is to murder Kim Possible in front of Danny Phantom and procure himself the power to become a deity. [[spoiler: Even more horrifying is that he's [[CanonCharacterAllAlong revealed to be Dark Danny]] under that armor, trying to reinsert himself in the timeline. Just the idea that Danny still could've have become such a horrid monster was no doubt something that [[EvilMeScaresMe haunted him]]. He's fortunate he used the same power Dark Danny wanted to restore all the damage he caused.

* Thanatos, the self-proclaimed god of death. His first proper appearance involved him killing off all of Lorwardia, only for a vengeful Val-Yor to try to do him in for attacking his homeworld. Last Val-Yor is seen, a NeckSnap occurs. The next chapter confirms his end. Following that, Thanatos also ends Ma Vreedle's life from blasting her on the inside, and ends his first night on Earth wiping out most of Quahog. His ultimate plan is to murder Kim Possible in front of Danny Phantom and procure himself the power to become a deity. Even more horrifying is that he's revealed to be Dark Danny under that armor, trying to reinsert himself in the timeline. Just the idea that Danny still could've have become such a horrid monster was no doubt something that haunted him. He's fortunate he used the same power Dark Danny wanted to restore all the damage he caused.
* Deadpools actions are largely PlayedForLaughs but still, a deranged man who has no qualms with butchering people and making light about it is unsettling.

* Deadpools actions are largely PlayedForLaughts but still, a deranged man who has no qualms with butchering people and making light about it is unsettling.

* Katie Kaboom is an In-Universe example. Imagibe a seemingly normal girl who has the ability to turn into a near unstoppable monster at the slightest provocation.

* Danny being the object of Katie's desires is treated comically, but in hindsight it's rather terrifying. Katie is highly unaware of how monstrous she is when she transforms, being so tough that Danny did not such harm to her and so, when he encounters her again at the carnival, he's found himself suffocated by her. He even has a nightmare of being married to her, one against his will, and soon finds himself fathering 8 children, all of them with her powers. Spin-offs reveal Danny never opened up about his nightmare, and for good reason.