Where to find Mr Clayton on kingdom hearts?

In Kingdom Hearts, Mr. Clayton can be found in the Deep Jungle world, specifically in the area known as the Elephant Graveyard. He appears during the story when he is hunting for the gorillas, particularly Tarzan and his friends. You'll encounter him during a boss battle where he uses a gun and commands the Heartless. Defeating him is part of the progression in the Deep Jungle storyline.