When a Scizor sheds its skin, a Flygon will sometimes enter the shed skin. It flies to its nest and grabs two Trapinch. Heat is easily trapped inside of the shed skin, so it will catch fire. They make an opening in the shed skin to make a place for the fire to exit. They can use this fire to fly at high speeds.
Credit to GameFreak (Pokemon Diamond and all of the sprites). Sprites used: Scizor, Trapinch, Flygon, Drifblim and Charizard.
