Sonic: Night of the Werehog (2008) (Short)

Sonic: Night of the Werehog is a short 3D animated film released on November 21, 2008.

Storyline
It tells the story of two male ghosts who live in a haunted house taking pictures of scared children in order to woo a female ghost, and their frustration with an unafraid Sonic who enters the house with a very afraid Chip. But soon, it's the ghosts who are afraid when Sonic looks at the full moon and transforms.