Mook Seniors are enemies in EarthBound. They appear in the Stonehenge Base and can be grouped with Lesser Mooks, Atomic Power Robots, a second Mook Senior, and Starmen. Mook Seniors can use PSI Fire α, PSI Freeze β, Lifeup α, and Diamondize a character by glaring with their eerie eyes. Along with all of Giygas's henchmen, Mook Seniors retreat from the Stonehenge Base once Starman Deluxe is defeated.