Wicked Dwarves

"They did not hate dwarves especially, no more than they hated everyone and everything, in some parts, wicked dwarves had even made alliances with them." -The Hobbit, Over Hill and Under Hill

Wicked Dwarves are Dwarves who followed Morgoth in the First Age and Sauron in the Second Age. Their canon is disputed, but many notes and actual lines from the Hobbit actually suggest that there were evil Dwarves that served Morgoth and Sauron. It has even been suggested that the Petty Dwarfs were actually the major contributors to Morgoth during the First Age and the Battle of Palisor--their wicked ways shunned by the rest of the Dwarves. Other suggestions are that they are Dwarf clans from each of the seven houses who went with Morgoth and the Petty Dwarves.

Throughout the writings of the Lord of the Rings, Hobbit, and Silmarillion--it has been suggested that evil dwarves played a part in the helping of the Dark Lords.