Danny Phantom

Danny, Sam, and Tuck are out hunting ghosts, and they run into The Box Ghost in an alley. They capture him, and then Tucker accidentally drops the Fenton Thermos, releasing all the ghosts they caught earlier. The screen then goes to Skulker, a predatory ghost hunter who hunts all things rare and unique, he sets his eyes on Danny, one of the world's only half-human half-ghost hybrid.

The next day, Danny goes to school, and gets a D on an assignment he had to do. He wants to raise his grade, so he has to study a rare purple-back gorilla at the zoo. Skulker starts stalking Danny at school, but Danny's unaware.

Later at night, Danny, Sam, and Tucker go to the Amity Park Zoo to watch the gorilla, Sampson. Skulker is also there. Sampson warns Sam of something, so she lets him out of his cage. He attacks Skulker when he sees him. Danny and Tuck are asleep due to boredom of watching the gorilla for six hours straight. Sampson and Skulker's fight wakes them up. Skulker manages to escape, and Danny puts Sampson back in his cage.

The trio goes back to Danny's house. They enter Danny's room and Skulker captures Danny in his net, but then Danny goes intangible and escapes. Skulker and Danny start fighting in Danny's room. Skulker manages to take Danny down to the lab. He's about to trap Danny in the Ghost Zone, when Sam interrupts. Danny takes advantage of Skulker not paying attention to him, and kicks him. Skulker lands on Tucker and finds his PDA, and attaches it to himself.

Skulker again captures Danny with the power from the PDA, but there's a side-effect that Skulker doesn't know of. The PDA reacts to Tucker's schedule and takes Skulker to what was on Tuck's schedule. After a few more times of the same thing happening, Danny learns the PDA's side-effect and decides to get ahead of the schedule.

Later that night, Danny, Sam, and Tuck go to the zoo before Skulker gets there. Tucker fools around with Skulker's PDA, by re-programming his, since they're the same. Skulker, then, destroys Tucker's PDA. Danny's last resort is calling on a friend... Sampson! Sampson beats up Skulker and destroys his armor, Skulker turns out to be a small green blob-ish like creature. Danny discovers that Sampson is a girl, and the next day, his grade is only raised to a C.