There are two versions of the scene where Bookworm disguises himself as a teddy bear and climbs into bed with Sleeping Beauty then whacks Sweetie over the head with a mallet, one was by Encore the other which originally aired on Fox was done by an uncredited Jon McClenahan working under Kennedy Cartoons.
In "The Learning Principal", the principal says, "Buster Bunny." and Buster replies, "That's my name, don't wear it out." There are two versions of this scene. One version is animated by Encore Cartoons, while the other version has entirely different footage animated by an uncredited Jon McClenahan.