Dark Danny

Dark Danny, also known as Danny Phantom is the main antagonist in the Nickelodeon Danny Phantom Special The Ultimate Enemey.

Debated Validations

 * He does arguably lack a moral agency. Likely showing he wasn't willing to be evil on his own. However, considering he was willing to take Vlad's ghost half and fuse with it, destroy his human self, and leave Vlad to tell the others about Dark Danny, and try to destroy a timeline and killed some people along the way just to exist. As well as the super intelligence he has gotten. He really did know what he was doing and knew what he was doing was wrong when gathering Vlad's ghost self. Not to mention, the sadistic smirk the ghost self of Danny Phantom has shown before fusing with Vlad's ghost self becoming Dark Danny which really shows to an extent Dark Danny knew what he was doing anyways.
 * While it did seem Danny's ghost self was overwhelmed from the ghost half of his arch-nemesis Vlad. It was likely the dangerous powers he was obtaining and he was really reckless and careless choosing to get Vlad's ghost half and fuse it and kill his frightened human self Danny Fenton leaving a human Vlad to tell the others while destroying the building laughing sadistically.
 * It seems to many that Dark Danny admires many of the present timeline residents saying that the arrival could be a "heart-felt reunion". However, he likely was just reminiscing about the past than feeling any remorse. Let alone enough to want to truly redeem himself as he wanted to destroy a timeline just to exist.

What made him heroic?

 * When he received ghost powers he promised to use his powers for good.
 * He wanted to defuse his powers after the demise of his family after cheating on a test. Likely feeling some remorse and guilt and wanting to ask Vlad to remove his ghost self to prevent any incidents like of such from happening again.

What made him villainous?

 * Danny cheats on a Chest which leads to him and his family being pulled for a meeting with Mr. Lancer to establish the issues Lancer has with Danny's test and this subsequently leads to the demise of Mr. Lancer, Danny's family, and friends.
 * His ghost self gets Vlad's ghost half and fuses together becoming overwhelmed. And destroying his human self and the laboratory of Vlad's.
 * He tries to impersonate younger Danny and ensure that the similar outcome would happen again.
 * He tries to destroy timelines likely killing innocents along the way. And even attempts to do the same to the present one with Danny's friends and family. Although, he fails.
 * Dark Danny taunts his younger self being him even during Dark Danny's defeat.
 * The fact that Danny is still alive during his defeat in a locked cell he is imprisoned and there is no indication of him dying shows that he may as well still be alive and might pose as a potential threat again. Although, there isn't much proof at the moment it remains unknown and ambiguous.
 * Overall, he shows zero redeeming qualities within the show likely never caring about redeeming himself overall.

Trivia

 * Dark Danny is one of the darkest Fallen Heroes within the Danny Phantom franchise to pose as one of the darkest counterparts of Danny. While other villains either worked with Danny or fail some standards to Danny in some way or has some standards of their own.
 * It remains up for debate if he could ever return or not if Danny Phantom gets rebooted. If so, it may be likely that Dark Danny might be dead due to how Dark Danny was overcame by Danny Phantom who chose to use their ghostly powers to do good from now on. Yet, the problem is that he is still alive implying Dark Danny's existence might be possible. Which adds for another debate alongside.