Shiranui continued his theme of using ancient Pokémon when he sent Kohaku out against a Blitzle.  "[i]Blitzle, the electrified Pokémon.  Its mane shines when it discharges electricity.  They use the frequency and rhythm of these flashes to communicate.[/i]"  One Earthquake from the Mega Aerodactyl was enough to shake Blitzle into a knockout.