Boo Boo Runs Wild is a stand-alone special parody of the Hanna-Barbera cartoon series The Yogi Bear Show. It was made by The Ren & Stimpy Show creator John Kricfalusi and his company Spümcø. Boo Boo Runs Wild originally aired on Cartoon Network on September 24, 1999, along with A Day in the Life of Ranger Smith, a similar Yogi Bear-themed stand alone special. Despite Boo Boo being the arguable star of this short, it is title carded as "A Ranger Smith Cartoon".
Since its original debut in 1999, Boo Boo Runs Wild has aired multiple times on Cartoon Network's late night programming block, Adult Swim. From January 2006 until April 2006, Boo Boo Runs Wild aired every single Sunday on Adult Swim. On April 1, 2006, following the normal Neon Genesis Evangelion bump, Adult Swim aired Boo Boo Runs Wild as an April Fool's Day joke, despite all TV listings showing Evangelion in its normal time slot. Adult Swim re-aired Boo Boo Runs Wild on Halloween night, October 31, 2008, as part of an advertised "Halloween Stunt" night, where obscure or randomly seen shows preempted the usual programming for that Friday night. In 2011, Adult Swim re-aired Boo Boo Runs Wild every night from January 10 until January 14, as part of their "DVR Theatre".
- John Kricfalusi as Boo Boo Bear and tree
- Stephen Worth as Yogi Bear
- Corey Burton as Ranger Smith and moose
- Mary Ellen Thomas as Cindy Bear
- Michael Pataki as the Chief
Just when Ranger Smith is making sure everything in Jellystone Park is in order, Boo Boo enters a feral state due to his impatience with all the rules, much to the displeasure of Ranger Smith, who expected Yogi Bear to do this. Boo Boo's actions go from clawing the backsides off trees to savagely devouring honey from a hive. So, Yogi Bear, scared, decided to attack and fight with Ranger Smith, and the cartoon ends with Boo Boo turned back to normal by Yogi and Ranger Smith.