Kamen Rider Kabuto Episode 49

Arata rushes to stop Masato's plans of using a meteorite to drain Dark Kabuto of his powers. As he reaches the area of the final battle, he finds Masato and Negishi conducting a broadcast all around the planet. Unbeknown to the humans, the signals sent out by the broadcast are composed of Dark Kabuto's drained power and causing the humans to become Natives. As Arata lays defeated, Souji appears, after going one-on-one with Masato, Arata regains his strength and joins Souji in a double team on Masato for the final battle. (Source: kamenrider.fandom.com)