Ben 10 Planet


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Omniverse Ishiyama
General Information
Species Video Game Character (Created as a Human)
Age Unknown
Affiliations Sumo Slammers
Occupation(s) Sumo
Powers and Abilities
Abilities Enhanced Jumping
Enhanced Strength
Size Alteration
Alias Ishy (Max)
Voice Actor Keone Young
Paul Eiding (Ultimate Alien)
First Appearance Game Over

Ishiyama was credited as a Great Sumo Slammer Warrior in Game Over with the ability to increase his size, durability, and strength.

Original Series

When Ben and Gwen were sucked into the Sumo Slammer Smackdown video game, 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 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 and show them a shortcut to the last level. He considered Gwen a far greater fighter than Ben. He and Gwen fought Kenko while Ben 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 Grandpa 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.

Alien Force

Ishiyama was mentioned in The Final Battle: Part 1 where Ben stated that his enemy Kenko teamed up with him in the Sumo Slammers sequel series, Sumo Slammers: Hero Generation.

Ultimate Alien

Ishiyama starred in Sumo Slammers IV: The Movie in The Perfect Girlfriend, battling one of Kenko's minions in a sumo ring.

Ishiyama in Ultimate Alien
Dr. DementorAdded by Dr. Dementor


Ben 10

Ben 10: Ultimate Alien

Ben 10: Omniverse


  • Ishiyama is the last name of Yumi from Code Lyoko and Code Lyoko Evolution. 
  • His name is Japanese for "stone mountain."

See Also

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