The MasterBuilders ride The Funtastic World of Hanna-Barbera is the pilot of KirbyGuy1991's series where the characters Emmet, Lucy, Benny, Unikitty, Vitruvius, and Batman, all from The LEGO Movie, Embark on a worldwide journey to go on lots of attractions from major theme parks. The inspiration for KirbyGuy1991 to do this series was greenth1ngReturns' videos.
Inside the preshow, there were 3 projection screens. Two oval shaped screens and a regular square screen. On one of the oval screens, Yogi Bear appeared pestering guests for food, Boo Boo shows up to inform him that the guests are here for an animation demonstration by William Hanna and Joseph Barbera. The two (live-action) appear on the square screen and begin talking about animation, leading to drawing Elroy Jetson, who magically comes to life and jumps out of the paper three dimensionally. Hanna goes on to talk about computer animation using Dick Dastardly's airplane (in this case, a spaceship). Dastardly and Muttley soon show up from inside the spaceship's depths, requesting that they be a part of Hanna-Barbera's next project. However, Barbera informs him that the Jetsons are next (coincidentally, at the time of the ride's opening, the release of Jetsons: The Movie was only several weeks away) followed by the Flinstones and Scooby-Doo. In a fit of rage, Dastardly kidnaps Elroy by forcefully pulling him Into the computer using the suction of a toilet plunger gun, claiming "If I'm not the star of the next project, then no one will be! I'm taking Elroy where you'll never find him!" The computer begins to self-destruct and the two run away. Yogi and Boo Boo, feeling they should do something, go (with the ride guests) into a rocketship (the main theater) to go save Elroy from the evil plans Dastardly and Muttley have in store for him.
When the Riders enter the main theater, the riders are seated in a rocket ship with Yogi as the captain. The power source is a large rubber band.