Happy Tree Friends (Commonly abbreviated to HTF) is a Flashcartoon series by Mondo Mini Shows, created by Kenn Navarro, Rhode Montijo, and Aubrey Ankrum, and developed by Montijo, Navarro, and Warren Graff. In the episode Happy Trails Pt. 2: Jumping the Shark Flippy has Pop's voice. This is because Pop was originally supposed to star in this episode, but the writers thought that it would be too 'out of character' for Pop to kill Flaky, and for Pop to appear without Cub. They replaced him with Flippy (since both characters are voiced by Aubrey Ankrum, even though Pop has a much deeper voice) at the last moment, after all the voices were recorded. As a result, this is the only episode where Flippy doesn't 'flip-out' in any capacity. It is unknowen if there was any animation done with Pop insted of Flippy. Also in a deleted scene, the gang killed Flaky onscreen. This was cut as it was considered too gruesome. Flaky'soff-screen death is often discussed by fans - some say Flaky was buried alive or hung among other possibilities.