Watch Gomovies. When Selma the Wicked Witch enlists an arrogant little elf named Grumper and his pet dragon Grus to transform Christmas into a whole new holiday known the world over as Witchmas, it sparks mayhem on the eve of the big day. Enter the ever-vigilant ELF Detective Agency - Jingle, Bingle, Tingle, Dorabelle and Cheer - to save the day in Witchmas.