The Fairly OddParents: Scary Godparents

Screenshot from the episode.

"Scary Godparents" is the Halloween special of the animated series The Fairly OddParents.

Plot

Timmy wants to dress up for Halloween as a jackobot from the "Crash Nebula" episode, but the rich kids have the only four existing jackobot costumes. Timmy has to go out in a cheap costume, he gets hardly any candy while he is trick-or-treating and when he does get some, he has to give it to Vicky. The rich kids get all the candy because their costumes are real. Timmy wishes all the Halloween items real and scary, but when Mark, the alien, comes and the jackobots plan to destroy the world, he has to do something.

See the article on Scary Godparents on Fandom's Fairlyoddparents wiki.