Ape Escape: Pumped and PrimedEdit
Grid Core first appears in Pumped and Primed, where he takes the disc that Helga's father had created and hidden within the High-Tech Tournament's Trophy to gain control over the virtual world. After announcing that the Pipotron Brothers are useless to him now and that the disc will take awhile to analyze, he challenges all players to enter the "Virus-Tech Tournament", where they must fight for their lives to continue and hope to stop him. Once they defeat the Super Pipotrons, Dark Jake, and Dark Specter's Battleship Goliath, the players confront Grid Core in the very core of the virtual world, where he deems them too dangerous to keep alive. He inserts the disc into the core and assembles a polygonal battle grid to fight the players but loses and is presumed to be deleted. In the end, the virtual world's core resets and everything is returned to normal.
Ape Escape Million MonkeysEdit
Grid Core later reappears in Million Monkeys, where Nazo had reprogrammed him with a new appearance and new powers. Team Kakeru/ Team Specter confront Grid Core after clearing two puzzles and facing an army of Virus Casi.