Dark Danny

Dark Danny or known as Dan Phantom, is a future evil version of Danny Phantom and also the main antagonist of Danny Phantom: The Ultimate Enemy. He was created after the ghost forms of Danny and Vlad Plasmius sniffle, he is the most evil and cruel villain in the series and also one of the most powerful.

Biography
In the future, Danny used his powers to cheat on the Career Aptitude Test, however, Mr. Lancer, Danny's teacher soon suspected this, and asked his family to go to Nasty Burger for a meeting, Sam and Tucker were there. But the Nasty Burger vat somehow exploded causing Danny's relatives, Sam, Tucker and Mr. Lancer to die except Danny who was orphaned and was forced to take shelter with his archenemy Vlad Plasmius that even the two share a hate for the other, Plasmius treated Danny well and sympathetically. Danny managed to deal more with the guilt and asked his former archenemy to remove his phantom powers which was what he did, believing that his phantom part was responsible for the deaths of his family and friends teacher that Plasmius agreed, after separating your ghost part. However, the ghost part of Danny and Plasmius soon sniffled and now having no more empathy or remorse, Dark Danny soon killed his former human self and left Plasmius Mansion with a blast, Dark Danny soon after began in a period. Of destruction throughout the Human and Ghost World.

The Ultimate Enemy
Clockwork soon sent Danny and his friends past the Dark Danny defeat experiment, at first Danny found his powers fantastic, but from Dark Danny's evil deeds he soon realized that Dark Danny was a villain and fought him, who was reducing the future Amity Park in the rubble, and then having quickly passed his ghost shield and Ghostly Wail power. Danny was no match for his futuristic version, then eventually Dark Danny merged with the time madalion and arrested Danny in the future so he wouldn't escape. After realizing that Clockwork is keeping him from becoming him, he threw his version of the past into the Ghost Zone to make sure he got out of his way, to transform his past version like him. Then Dark Danny went to the past wearing a time medallion to make sure the events that created him happen, but Danny's sister Jazz soon realized that he wasn't  really Danny.

He succeesfully fooled the CAT by using the answers Danny had gotten earlier by accident, causing Lancer to call his parents to Nasty Burger. Sam and Tucker tried to warn them about the impending explosion and Jazz came along as well. And using the Fenton Ghost Peeler to reveal Dark Danny's true form, he managed to use the ectoplasm to trap everyone in the spice cube, and waiting for the blast, however, Danny arrived at his original timeline and can saved everyone with taking them out of the time locket with the help of the futuristic version of Vlad Plasmius.

Defeat
To be able to guarantee its existence, Dark Danny could not kill his newer version, so he would have to hold it until the explosion happened, they fought each other, yet even using the specter deflector and ghost maneuvers, but even so Danny was no match against his older evil version.