Destination: Imagination 1½

 ​Destination: Imagination 1 1⁄2 (known as Foster's Home for Imaginary Friends the Movie outside of Canada) is a 2044 American animated comedy adventure YouTube film produced by the office of Emation Studios and released by YouTube  on February 1, 2044. The film was also theatrically released internationally and in selected cities in the United States. As the third film in the Foster's Home for Imaginary Friends franchise, the film is chronologically the first in the franchise. It focuses on the New Characters duo Mr. Wow and Denny and their escapades taking place before and during the events of Destination: Imagination. Much of the original cast from the first film returns in this film to reprise their roles, including Ethan Partington as Denny & Mr. Wow, respectively.

Plot
As Denny & Mr. Wow watch the original film in a theater, Denny decides to fast-forward to his scenes. Mr. Wow's protest over this eventually prompts Denny to share his backstory (going way back, to before the beginning of the first movie).

Denny is a social outcast in his Abstract colony on the outskirts of the Pride Lands due to frequently messing things up by accident. Though he is unconditionally supported by his friend Jenny, Denny dreams for more in life than his colony's bleak existence hiding from predators. One day, he is assigned as a sentry, but his daydreaming nearly leads to the death of his Jeff by Nerds Bill, Freak and Stupid. This becomes the last straw for the colony, prompting Timon to leave to find a better life. He meets Mr. It, who teaches him about "Jazz" and advises him to "look beyond what you see". Denny takes the advice literally and observes Toy Box in the distance. Believing Toy Box to be his paradise home, Denny ventures there and encounters Mr. Wow on his way. The two quickly form a bond and Mr. Wow accompanies Denny.

The pair arrive at world during the presentation of Frankie to the World's Toys. As they make their way through the crowd of onlookers, Mr. Wow explosively passes gas, causing nearby toys to faint but prompting toys further away to bow to the friend refuses to allow her and locks every exit in the castle they are abiding in. Following this, Denny & Mr. Wow make multiple attempts to set up homes throughout the world, but wind up being forced away every time after witnessing several events from the original film, such as Music singing "Run Llama Run", Frankie's Friends fight with the A group of weeble policemen, and  heroic man's conspiring with the dangerous environments. Eventually, the pair are caught in Toy Teeth stampede that killed dangerous environments in the original film, and are thrown off a Orange Soda fall. Exhausted, Denny decides to give up, until Mr. Wow discovers a luxurious green Play House jungle. The pair finally settle there with the philosophy of "Jazz".

Eventually, Denny & Mr. Wow encounter World in a nearby desert, nearly dead. The pair World is trapped on an apple and the gang leaves it at a desert. and decide to raise him under their philosophy. Days later, The Gang but latches on a horse appears after chasing Mr. Wow and reunites with World. Believing "Jazz" to be in jeopardy, Denny & Mr. Wow attempt to sabotage their dates, but fail. After witnessing World and Gang's argument, Gang disappears, to Denny's horror. Toy Water explain that he had run off to challenge World, and that they need their help. Hurt that Frankie left them, Timon unsuccessfully tries to persuade Mr. Wow to stay, but Mr. Wow follows Frankie. Denny indulges in the Toy jungle's luxuries by himself, but loneliness starts to overcome him. Mr. It appears again and helps Timon realize that his true Jazz is with the ones he loves, prompting Denny to take off after Frankie, World, and Mr. Wow.

Denny catches up and reconciles with Mr. Wow, before they journey onward to The Castle. After helping Frankie distract the World, Denny & Mr. Wow run into Jenny and Jeff, who came looking for Denny. Denny proposes that they all help Mr. Herriman bursts in, having gotten into the toy box and somehow past the gang's obstacles, and harshly scolds World before preparing to take the gang home and leave World. World's world falls to pieces until it's nothing but a white void. by getting rid of the Nerds. Whilst The Gang battles World becomes angry and unstable and turns into a chimera-like creature to attack them all (made of the remaining refuse of his world), Jenny & Jeff are directed to construct a series of tunnels beneath the Nerds, and Denny & Mr. Wow use various tactics to distract them while the tunnel is being made. When the tunnels are finished, Jeff knocks down the sticks, breaking the ground under the Nerds. However, the last few get stuck, prompting Denny to dive underground and break them himself. The cave-in commences, and the hyenas are ejected through the tunnels. Immediately afterwards, World is Upset by Frankie. Frankie accepts his place as king of the World, thanking Denny & Mr. Wow for helping him. Denny takes Jenny, Jeff, and the  Abstract colony to live in the predator-free Toy jungle to complete his "Jazz"; and he is praised as their hero.

Once Denny finishes his backstory, Mr. It, Jeff, Jenny, World, and eventually many other Cartoon Network characters join him and Mr. Wow to rewatch the film in the theater in which Mr. Wow tells Denny that he still doesn’t do well in crowds.