Premise: Boo Boo and the Man is a 2002 short cartoon starring Boo Boo Bear, the sidekick of Yogi Bear. It was made by "The Ren & Stimpy Show" creator John Kricfalusi and his company Spümcø using Macromedia Flash. The short was one of the last "Web Premiere Toons" shorts produced for Cartoon Network's official website.
Hypothesis: Boo Boo and the Man was created using Macromedia Flash