Danny and Vlad’s game of revenge against each other begins with childish pranks, and, unfortunately for Danny, ends when Vlad decides to run for mayor of Amity Park! By overshadowing voters, Vlad wins in a landslide. The new mayor is eager to use his new power to make life as miserable as possible for Danny and his friends. He shuts down the Nasty Burger, outlaws technology, creates new school uniforms, and passes so many new laws in the name of “protecting the children” that Danny finds it impossible to go ghost.

When wish-granting ghost Desiree gives Tucker ghost powers, Danny finds himself dealing with his friend's jealousy in the worst way possible: by having to fight him.

Living dual lives as a high school freshman and a superhero is a balancing act for Danny that just got even tougher, with both Lancer and his parents pressuring him to ace a test. At the same time Technus ghost master of technology has escaped into Danny's online game and threatens to flee into the Internet and take over every computer in the world!

The building boom in Amity Park upsets Undergrowth, the ghost of all things plant-like and vegetative. The green-thinking ghost takes over the town, turning everyone into plants themselves. All except Sam, that is, whom he makes his Earth-loving queen. Unfortunately, Undergrowth brainwashes Sam and uses her to attack Danny! Danny, meanwhile, has been battling a nasty case of the chills that leaves him too weak to fight. Escaping from Undergrowth in the Ghost Zone, Danny turns to his cold-loving friend, Frostbite,who explains that Danny is developing a new power. Now, Danny must learn to master his new freezing skill so that he can make his way back to Amity Park and pull the town out of Undergrowth’s leafy clutches.

When Paulina witnesses Danny's ghost transformation, he fears the exposure. Imagine his surprise when Paulina swears to keep his secret - then becomes his girlfriend! Life is great for Danny, until he finds out that Paulina has actually been overshadowed by Johnny 13's girlfriend, Kitty, in her plot to make Johnny jealous. Danny reluctantly plays along to protect his own identity, but, when Kitty's welcome wears thin, Danny pleads with Johnny 13 to take her back. When Kitty abandons Paulina's body and goes back to her true love, Paulina resumes her indifference towards Danny Fenton - although she's now madly in love with Danny Phantom!

Danny and Sam get into a fight, and when Sam utters the words, "I sometimes wish I'd never met you," she finds herself in a world in which she and Danny are strangers. Worse than that, since it was Sam who encouraged Danny to check out the Fenton Portal the night he got his ghost powers, Danny doesn't have any powers! Now, Sam must convince Danny that they share a friendship and a history, and lead him back to the Fenton Portal for a second "accident" so he can again become Danny Phantom.

When Vlad Plasmius accidentally awakens the most powerful ghost of them all -- Pariah Dark, the King of all Ghosts -- Danny quickly finds himself the pawn in an action-packed, suspenseful game of chess. The only way to defeat the Ghost King seems to be a brand new Ecto-Skeleton battle suit that Jack and Maddie have constructed, but there's one big problem: wearing the suit can be fatal and only Danny can use it to defeat the Ghost King. With time running out, and the entire town of Amity Park sucked into the Ghost Zone, Danny Phantom must battle the all-powerful Ghost King to save his family, his friends, and even his enemies.

Technus is back, with a new plan to beam himself up to a super satellite and take over the world, and he's going to use Axion Labs to do it. As Danny Phantom battles Technus, Danny Fenton begins battling his feelings for Valerie, whose dad is back in charge at Axion. Sam and Tucker are surprised when Danny confesses he's thinking of asking Valerie to go steady. Unfortunately, as Technus puts his plan into action at Axion Labs, Valerie realizes her role as ghost hunter is putting her family and friends in danger. Can romance work between two kids with secret identities, or will the ghost boy and the ghost hunter end up breaking each others' hearts?

Vlad's up to something and it involves Danny. After he sends three ghosts to Amity Park to battle Danny Phantom, it is revealed that he's working on his creepiest project yet: a clone of Danny Phantom. So far, the clones he creates can't sustain their forms for very long, but Vlad is determined to succeed. Danny doesn't have long to worry about Vlad's ghostly visitors, however, because he's distracted by the appearance of Danielle, a cousin he didn't know he had. And then, Danielle reveals that she too has ghost powers -- she's Dani Phantom! Unfortunately, she's also a product of Vlad's experiments, and therefore an imperfect ghost with an unstable form. Danny must convince his new "relative" to turn on her creator and help him destroy Vlad's evil experiment, before it's too late for both ghost kids.

School's out and Danny has nothing on his mind except a relaxing, fun and a ghost-free summer vacation. His dream is quickly destroyed when Freakshow, the villainous ringmaster with ghostly minions, escapes from jail. Danny, caught off guard, is forced to forfeit his summer plans when Freakshow manages to reveal Danny's secret identity to the entire world! To make matters worse, Freakshow kidnaps Danny, Sam and Tucker's families and uses them as pawns in this evil game of revenge. Now, on the run and hiding from everyone, Danny must rely on his powers to stay free, fulfill Freakshow's ransom demands and save his parents. With Tucker and Sam by his side, Danny travels cross-country to track down three "Reality Gems," which, when combined, will give Freakshow the power to turn Danny's world into his very own nightmare circus! As the sun sets in the west, Danny's enemies close in on him and Freakshow forces the hands of time closer to the fate of DOOM!

Danny's new ghost powers are put to the test when the school cafeteria's all-vegetarian menu arouses the ire of the ghostly Lunch Lady, a 50-foot shambling pile of mystery meat who seeks revenge and a return to high-cholesterol diets. It's up to Danny to push her back in the fridge where she belongs.

Danny meets his evil opposite in Vlad Plasmius, a childhood rival of his ghost-hunting dad, Jack. Unfortunately, Vlad acquired ghostly powers 20 years ago, which means he's stronger and more experienced than Danny -- and hell-bent on taking everything away from Jack Fenton including his life.

Danny fears he's going to cause his parents' break-up when he knocks Jack's anniversary gift into the Ghost Zone. Desperate to retrieve it, he dives into a ghostly dimension where he runs afoul of Walker, the ghost warden of a ghost jail, and is thrown into prison with every ghost he's ever caught.

Noticing a change in little bro Danny since the accident in the lab, Jazz mistakes his ghost hunting for depression and signs him up for therapy with Penelope Spectra, not knowing that Spectra is a ghost who feeds off teen misery!

Danny and Sam find their platonic friendship turned forcibly romantic through the musical powers of Ember, a hard-rocking girl ghost who feeds off the idol worship of teens. With her massive, free concert scheduled only a few days away a concert that will be broadcast worldwide and give her ultimate power Sam has to get the now completely and utterly love-addled Danny to focus on fighting ghosts. Even if it means breaking his heart.

When Vlad Masters' ghost portal explodes, he schemes to replace it by stealing Jack Fenton's portal. As a distraction, Vlad anonymously offers a million dollar bounty to eliminate Danny Phantom. As ghost hunters from around the world gather in Amity Park to hunt the ghost kid, Danny sacrifices himself to Jack - both to win the prize money for Dad and to bolster Jack's inept reputation, which embarrasses Danny. However, when his family's life is put in jeopardy, Jack needs no help from Danny to save the day on his own.

Sam rebels when her overprotective parents forbid her from attending the strange Goth circus that's come to town. Little does she know that the circus performers are ghosts, under the mystical control of the creepy ringmaster named Freakshow, who also uses the ghosts to loot the town. When Danny falls under Freakshow's spell and joins the circus - and the robbery spree - Sam must operate under the radar to destroy Freakshow's magic crystal ball, free Danny and get grounded, big-time.

Danny and his friends get caught up in a time-traveling adventure. They are taken into a dark future, in which Amity Park is destroyed and the world's most powerful and evil ghost is Danny's own future self!

Skulker's on a looting spree, snatching up a number of seemingly unrelated items. Unfortunately, Danny's attempts to stop him are thwarted by the well-intentioned meddling of Danny's new sidekick: Jazz. However, Danny didn't ask for -- and doesn't want -- Jazz's help, and after a series of humiliating mishaps, Danny blows up at his sister. In response, Jazz runs away from home... to Vlad's castle in Wisconsin! But it's only a ruse. Jazz soon manages to break into Vlad's inner sanctum and discovers that he has been using Skulker to collect the items necessary to upgrade the Fenton's stolen Ecto-Skeleton. When Danny arrives at the castle, Vlad makes Jazz don the improved battle suit in a no-holds-barred fight against Danny Phantom!

Sam's got a new crush: Gregor, a goth transfer student from Europe. And Danny's jealous, although he won't admit it. Instead, he convinces himself that Gregor is an undercover operative for the Guys in White, out to get Danny Phantom. When Sam finds out Danny has been spying on her, she's furious, but Danny's suspicious grows when the Guys in White show up in Amity Park. The mystery deepens as Tucker tries to help Danny uncover Gregor's intentions. Is Danny right? Is Sam truly in danger from Gregor and the Guys in White, or is Danny just jealous of Sam and Gregor's growing romance?

Danny uses his "overshadowing" power to take control of his Dad during a parent-teacher conference, but the plan backfires when Jack Fenton is invited to chaperone the school dance. At the same time a ghostly amulet turns the girl with whom Danny is smitten into a dragon, and he must alternately control his Dad and fight the ghost dragon!

Skulker, a predatory ghost hunting legend who fancies himself a collector of all things rare and unique, has set his sights on Danny Phantom, the world's only half-ghost/half-human hybrid. The games begin, as good and evil ghosts face off.

When Danny sells some of his parents' ghost-hunting junk to make money to buy a cool new outfit, the objects take on a life of their own and go on the attack. Now he must defeat Technus, the Spectral Master of all things technological, without ruining his new duds.

After a series of humiliating run-ins with Dash, the school bully, Danny uses his powers to get revenge and triggers the ghost of Poindexter, a kid who was shoved in his locker so many times he haunts it to this day. Danny must battle this ghostly defender of nerds and geeks, while proving he's not the bully Poindexter thinks he is.

When ghosts wreck a popular co-ed's school social life, she dedicates herself to hunting them, which forces Danny to deal with a threat just a few lockers down the hall. Worse yet, Tucker has a crush on the girl.