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When Ben Tennyson and Gwen Tennyson were sucked into the Sumo Slammer Smackdown video game, in the episode "Game Over" he aided them in their progress. At first he believed Ben was his arch enemy, Kenko the Shapeshifter, but was convinced otherwise by Gwen.
He and Gwen Tennyson fought Kenko the Shapeshifter while Ben Tennyson searched for the Upgrade] token on the final level. Kenko took his last life, but Ben revived him as Upgrade. He declared that he found Max, who joined them at the last minute and was little more than a rookie, to be the greatest warrior of all for knowing that cleansing Sumo Salt would reveal Kenko's true form when he disguised himself to deceive Ben and Gwen.
He is very honorable, responding that "A Sumo never cheats!" when Ben asks him if he knows any cheat codes to help them out, but decides to make an exception (possibly due to the urgency of the situation) and show them a shortcut to the last level.
Gwen Tennyson Edit
- See also: Gwen Tennyson
He considered Gwen a far greater fighter than Ben; this may have been because of Ben's reckless efforts at impressing him as well as Ben accidentally costing him two of his lives.
Ben Tennyson Edit
- See also: Ben Tennyson
Max Tennyson Edit
- See also: Max Tennyson
Powers and Abilities Edit
Ishiyama was credited as a Great Sumo Slammer Warrior, with the power to increase his size and strength in battle.
- His name is Japanese for "stone mountain".