My Babysitter's a Vampire - Season 1 Episode 5 Double Negative

The yearbook team is coming up with ideas for this year's yearbook photos and decide to use an old camera that Benny sold them. Unbeknownst to Benny, Ethan and the yearbook team, the camera is a magic camera; it creates an evil clone of who evers photo is taken with the camera. The yearbook captain, Hannah, takes a photo with the camera, bringing out her evil clone, who goes around being heartlessly mean to the students, especially Ethan. When her evil clone grabs Ethan's hair, he has a vision and realizes what happened. Meanwhile, Benny takes a photo of himself with the camera to get revenge from the yearbook captain for rejecting his and Ethan's yearbook ideas. Benny's evil clone is then created from the photo. Once Ethan and Benny realize that Benny has an evil twin, they turn to Benny's grandma for help. She explains that the camera brings out the negative side of one's soul, once the photo is developed, and that negative side becomes a separate person--their twin. To destroy these clones, they must destroy the negatives. Benny and Ethan race to stop the evil Hannah from using the camera to take the class photo. Ethan manages to destroy all the negatives. Benny wrestles with his evil clone in the bathroom and destroys him just in time and all the clones that were created from the camera vanish.