Yogi and Boo-Boo go on an out-of-this-world voyage. When they are kidnapped by spacemen, they are turned into clones and invade Jellystone Park.
Ranger Smith plans to send Yogi Bear to Siberia. While in hiding, Yogi and Boo-Boo are abducted by two aliens, Zor 1 and Zor 2 and taken to Planet Daxson. The next day Ranger Smith and his sidekick Ranger Roubideux try to find Yogi but find Cindy instead, who is angry and refuses to talk. Meanwhile, Zor 1 and Zor 2 introduce Yogi and Boo Boo to their boss, DAX Nova. DAX Nova creates clones of Yogi and Boo Boo and sends them to take over Jellystone Park.
Cindy meets with Smith and Roubideux, and tells them she's worried about Yogi and Boo Boo, but Smith tells her there is no sign of them. He then spots the clones of and locks them up. He then notices another three clone pairs, and in a panic locks himself up before calling for help. Back in space the real Yogi and Boo Boo need help to get home. Boo Boo meets his love interest Snulu and asks for her help in returning home. Dax Nova attempts to catch them, but ends up capturing a pair of bear robots.
Back at Jellystone Roubideux takes Cindy to see Smith, who tells her about the three Yogi Bears and three Boo Boos and jokes that he was having a nightmare. Cindy visits Mountain Bear and asks where Yogi and Boo Boo are gone. Upset, she starts crying, saying she misses Yogi. The next day she spots the Bear Robots and thinks she's having a nightmare, but she hears the voices of the real Yogi and Boo Boo. Yogi tells her all about the Bear Robots, and that they're called Dupiods. He tells her that he and Boo Boo trapped Zor 1, Zor 2 and Dax Nova in space and saved the park. That night they find Boo Boo singing to his girlfriend Snulu, whom he had to leave behind. Yogi tell Cindy that Boo Boo can sing now, and Cindy is so happy that she gives him a big bear hug.
The next day Ranger Smith gets into trouble with the commissioner, but Yogi and his friends clean up the robots. Ranger Smith then thanks Yogi for saving the park.
On December 7, 2010, Warner Archive released the movie on DVD in NTSC picture format with all region encoding, via their collection. This is a Manufacture-on-Demand (MOD) release, available exclusively through Warner's online store and Amazon.com.