Lava Titan is an antagonist who appears in Kingdom Hearts III. Although he is one of the four elemental Titans in the Disney film Hercules, along with Tornado Titan, he didn't make an appearance in the Kingdom Hearts series until Kingdom Hearts III.
Much like his fellow Titans, Lava Titan is vengeful against Zeus and more than willing to oblige Hades plans to destroy Olympus. Despite this, he fears Zeus and is quick to retreat when Zeus is back at full power.
Lava Titan is a gigantic, humanoid blob of molten lava whose upper body is in a constant cycle of cooling, hardening, and breaking apart again. He has a large humped back and a long neck with his head being carried below his shoulders. His face features a large mouth and hollow eyes.
The Lava Titan, along with his brothers, Tornado Titan, Rock Titan, and Ice Titan, were released by Hades just as Sora, Donald, and Goofy found their way to Olympus. Together, the four Titans destroyed Thebes and made their way to Mount Olympus, losing Rock Titan along the way, where they waged war with Zeus and the other gods. The trio of Titans that remained were quickly subdued by our heroes, but quickly recuperated after being rejoined by Rock Titan. Hercules decided to even the odds and was able to free Zeus from his rocky tomb, much to Hades' dismay. Zeus began to attack the Titans who immediately started retreating. Hercules reversed Tornado Titans vortex, sucking up Lava Titan, Rock Titan, and Ice Titan, and throwing them up into the atmosphere.