The Fire Imps are the demonic minions of Belladonna, and the tertiary antagonists of the Don Bluth's animated film An All Dogs Christmas Carol. They make an appearance in the Finale of Heroes vs. Villains War.
Heroes Vs Villains War
The Fire Imps are summoned by Belladonna on Bald Mountain to wreak chaos and kill the heroes, particularly the various Dogs and Cats. Giving chase, the Fire Imps attack Mickey Mouse's dog, Pluto, although he manages to escape them. By the end of the battle, the Fire Imps are banished into their original realm, along with the rest of the demonic creatures with the Legion of Darkness.