Scorpion Man was the first villain seen in the short Kamen Rider SD: Strange!? Kumo Otoko. In his secret pyramid base, after expositing about how his new army of monsters would take over the world, he commands the GranShocker troops to activate the machine that would bring them to life, only to be foiled by the arrival of the Battle Riders.
As the base gets demolished, Kamen Rider Black RX activates his Revolcane and slashes Scorpion Man. As his body gets engulfed in flames before he dies, he declares that the Riders haven't won and that GranShocker will live forever before exploding.