Mr. Hyde is a citizen of Halloween Town. He keeps two smaller versions of himself with him: one under his top hat, and the second under that top hat of the first one, and each smaller Hyde's voice is higher, depending on their size.
When Jack Skellington went missing, he searched all over the Pumpkin Patch for him, but to no avail.
He is voiced by Randy Crenshaw.
Trivia
Mr. Edward Hyde is the monstrous alter-ego of Dr. Henry Jekyll from Robert Louis Stevenson's Dr. Jekyll and Mr. Hyde.
Gallery
Hyde and Cyclops
Mr. Hyde decorating the fountain with tinsel
A miniature Mr. Hyde putting a scorpion into a stacking doll
