Randall Boggs

Randall is an antagonist from Monstropolis in Kingdom Hearts III. He originated in the Disney/Pixar film 

He desires to get revenge on Sulley and Mike Wazowski for getting him fired from Monsters, Inc. and subsequently banished into a door.

Kingdom Hearts III
Managing to escape "being turned into a wallet", Randall seethed with revenge, drawing the attention of Vanitas of the Organization. After explaining about how his world ran on the screams of children, Randall was offered assistance by Vanitas to get back for revenge against the duo who banished him; the dark being repaired the door by merging it with a dark corridor. They arrived at Monster's Inc., where Randall saw that the company had changed its business plan to instead harvest the laughter of children. Vanitas assured him that laughter (while 10xs more powerful than scream) was even harder to sustain and that Monstropolis would suffer another energy crisis. However, negative emotions could be just as powerful and lingered longer; if they managed to break the children's hearts over something truly precious to them, they would be able to harvest a great bounty of energy. To this end, Randall was given command of the Heartless and Unversed, using them to cause chaos in the factory, while Vanitas sent more Unversed through doorways to scare children.

Keeping camouflaged, Randall saw that Sulley and Mike had Boo with them again, along with Sora, Donald and Goofy. To keep them occupied while Vantias harvested negative emotions with the Unversed, Randall sent Boo's door back to the Door Vault to force the heroes to chase after it. In a brilliant plan to send them further away from the Laugh Floor, Randall clung to a white door and camouflaged himself to look like the flower pattern on Boo's door; this allowed him to send them straight to the other side of the factory, where he revealed his plan and taunted them about the "upgrades" he made to the factory, which included lasers on the conveyor belts. Watching them fight off the Heartless and Unversed, Randall confronted them right outside the Tank Yard, where he planned on unleashing the most powerful Unversed at his disposal - the Lump of Horror; however, it did not wake upon his command. Randall promptly left in a huff to find Vantias to wake it. Momments after the group left, Vanitas did arrive and brought the Unversed to life, much to Randall's delight.

They took the Lump of Horror to the Door Vault to wait for the group, where Randall revealed that he would take over the company thanks to the Unversed's help. Watching from a safe distance above, Randall woke the Lump of Horror and watched it attempted eliminating his enemies. However, the Unversed was destroyed. Without any more minions, Randall was forced back through the door he came through again. As his poor luck would have it, the owners of the house he entered mistook him for an alligator again and hit him with a shovel. To ensure Randall could never get back, Sora sealed the door with the Keyblade.

Vanitas would later mention Randall as a pawn consumed by his desire for revenge.

Appearance
Randall is a purple lizard-like monster with green eyes. He has two pairs of arms and two pairs of legs.

Personality
Randall is short-tempered and competitive.

Origin
Randall Boggs first appeared as an antagonist in the 2001 film Monsters, Inc., voiced by Steve Buscemi. He is a rival scarer at Monsters, Inc. with Sulley, but finds himself scoring less. Randall has constructed a "Scream Extractor", and tries to abduct a human child (Boo) as a conspiracy with the company's leader, Henry J. Waternoose, in order to gain company leadership.