Scizor first appeared when Gary used it to battle Ash in the Johto League Silver Conference. It battled Ash's Snorlax, evading its Hyper Beam with Quick Attack and defeated it with Metal Claw. Ash's Muk was sent out, who endured its Quick Attack and fired Sludge Bomb. However, Scizor evaded that attack, and used Metal Claw to lift Muk up and defeat it with Swift. However, Scizor was no match for Ash's Charizard, for it had no opportunity to use Metal Claw against its Flamethrower.
Ash, during his battle against Harrison, remembered his battle with Gary, including his Scizor.
With Professor Oak