When a large, dangerous imaginary friend begins to destroy the city, Imaginary Man comes to stop him. When Mac becomes his sidekick, Bloo becomes jealous and joins forces with Imaginary Man's enemy, Nemesister.
Trivia
- This episode borrows numerous trademark elements from "The Powerpuff Girls," another popular show by Craig McCracken.
- Mac references G.I. Joe, Fat Albert, Teenage Mutant Ninja Turtles (specifically Michalengelo) and Scooby-Doo whenever he tries a new catchphrase.
- The show Jackie Khones was watching was a scene from "One False Movie."
- Bloo resembles Darth Vader when he becomes Lord Uniscorn.
- The scene in which he is transformed into Lord Uniscorn is similar to the scene in which Anakin Skywalker is transformed into Vader in Revenge of the Sith.
- He also makes a reference to the famous "I am your father" scene from The Empire Strikes Back, quoting it almost word-for-word.
- Bloo's repetitive, extravagant speech as Lord Uniscorn is likely a reference to the way Mojo Jojo talks.
- The anchor man is voiced by Tom Kenny, who at the beginning of the episode, sounds like the PPG narrator.
- Bloo's superhero look appears as an unlockable bonus costume for him in Cartoon Network Punch Time Explosion XL.
Memorable Qoutes
- Mac: "Hey, hey, hey."
- Mac: "And knowing is half the battle."
- Mac: "Jinkies!"
- Mac: "Zoinks!"
- Mac: "Holy habadashery!"
- Bloo: "(Singing tune) DadadadadadadadadadundundundadundundundundundadundaDADADA!!!!!!!
- Bloo to Mac: "Mac, I am your father!'