Richie Wildebrat, a kid at Mac’s school, keeps bragging about his imaginary friend, Blake Superior and how they will win the imaginary friend talent show pageant. Mac wants to beat him so it can end Richie’s bragging, so he asks Bloo to enter the pageant, but Bloo does not want to. Bloo gets the hiccups, […]

Mac takes Bloo to school for show-and-tell, and his classmates love Bloo so much that they imagine their own Bloo knock-offs. Hundreds of Bloos come to Foster’s the next day and Bloo dubs them his minions, but when Mac shows up to take Bloo to see the Ice Charades, he cannot figure out which Bloo […]

A little dare between Mac and Bloo turns into a huge daring competition between the house members once Madame Foster gets involved.

When the whole house goes to a fair, Mac and Bloo compete to see who will throw up last on a ride called the Vomit Comet. Bloo ditches Mac to ride in Madame Foster’s Firebird, but a “quick” stop at the fabric store across the street from the fair suddenly turns into a nightmare for […]

A plan to have Mr. Herriman mellow out backfires as conditions at the home deteriorate.

Mac suspects that Bloo, along with the rest of the house, are planning him a surprise party. Mac, however, wants no part of it, since Bloo’s surprise parties always humiliate him in some way, and he is determined to foil Bloo’s plans by any means necessary.

Eduardo runs away from the home to prove that he is not a coward. Meanwhile, Terrence is looking for an imaginary friend to compete in the Extreme-O-Saur Battle, and he comes across Eduardo. While Mac, Bloo, Wilt, and Coco search for Eduardo, Terrence uses him to fight against huge imaginary friends at the junkyard.

In the series finale, Mr. Herriman explains that Mac is moving, Bloo decides to give him the best day ever, though things do not go as he planned. Through the entire day, Mac does things with everyone but Bloo, making him angrier and more emotionally hurt after every disappointment. He also gets more pressured every […]

Bloo is jealous of Wilt getting special attention for the number of abandoned imaginary friends he brings to Foster’s, so he tries to rescue imaginary friends just like Wilt does. When Bloo finds a man in a cell-phone suit and thinks he is a friend, he takes him to Foster’s, thinking everyone will give him […]

This episode tells the story of “The Big Cheese” through the eyes of a one-inch tall imaginary friend named Peas, detailing how he helped Frankie turn a negative into a positive.

A rich benefactor is considering giving money to a charity, and visits Foster’s to see if it is worthy. Mr. Herriman gets Mac and Bloo to keep Coco out of the way, but in the end, it is only when the benefactor mistakes Coco as Mr. Herriman’s wife that he considers Foster’s, and invites them […]

Eduardo tells some little white lies to the nursery residents of Foster’s, and now has to cover his tracks so they cannot catch up to him.

When Mac visits Foster’s, Bloo wants to show him something up on the roof, though when it is time for them to go back downstairs, they find themselves lost and unable to get downstairs. Meanwhile, everyone in the dining room sneaks food when Mr. Herriman is not looking after he insists they wait for Bloo […]

Bloo entertains Mac with an action-packed story about a crystal “potato” of power. A little boy (Eduardo), an alien (Coco), a hermit (Wilt), a magical fairy (Frankie), and the Superdude (Bloo) attempt to protect the crystal potato from the evil Lord Snooty (Herriman), who is taking away all the fun in the land ruled by […]

It is Adopt-A-Thought Saturday, an event that focuses on getting good friends adopted on the weekends when children are out of school. Mac and Bloo find out what Adopt-A-Thought Saturday is about after their good friend Jokey gets adopted. Not wanting to lose any more friends, they spend the day forcing everyone back into the […]

On Adopt-A-Thought Saturday, Madam Foster renews a feud with her cranky old neighbor Old Man Rivers with disastrous consequences. Meanwhile, Bloo tries to settle a score of his own with Rivers’ irritating grandson, Young Man Rivers.

In this double-length special, it is time for the Five Year Creator Reunion Picnic, where imaginary friends’ creators come to Foster’s to see their former friends. One friend’s creator, however, is missing: Wilt’s. Wilt, believing that his creator is still mad at him for a past let-down, sets off on a cross-country journey to set […]

A Rock And Roll Band called Pizza Party formed by some Imaginary Friends annoy Bloo by not allowing him to be their lead singer, so he decides to form his own band with Wilt, Eduardo, and Coco called Taco Fiesta. Soon, they are challenged to a “Battle of the Bands”.

When Ivan, a seeing eye friend, loses his blind kid, the friends try to find the boy before harm comes to him.

Bloo tries the old peanut brittle can filled with snakes trick, thinking it as the ultimate Halloween prank after strapping Mac to his bed, thus not allowing him to go trick-or-treating because of his regular sugar rushes. However, when Mr. Herriman tries it, Bloo thinks it has gone awry, and Herriman becomes a zombie, with […]

Mac drafts the gang onto Madame Foster’s bowling team to help her beat her arch-rival Jerkins, but when Mac gets booted off his own team, he must learn the ways of the ball from an imaginary bowling guru.

After appearing on local television news trying to outperform Eduardo, Bloo becomes a celebrity, doing commercials, television shows, movies and personal appearances. As time goes by, he discovers fame is not all it is cracked up to be.

Bloo has a reputation for being a funny imaginary friend, though his jokes sometimes offend people. When Bloo cracks a joke about an imaginary friend’s height, the “New Guy” challenges him to meet him outside at 4:00.

When various imaginary Santa Clauses are brought to Foster’s, Mac begins to lose his faith in Santa’s existence, so it is up to Bloo and the others to help restore Mac’s faith in the old St. Nick. Bloo sends Wilt on a sleigh ride around the world and tries to get Eduardo to slide down […]