S11·E12 Riding the Winds of Change!

Ash and company visit a town where it is plagued with a group of Gligar led by a Gliscor. Ash and friends help Officer Jenny try to remove the flying Pokémon, while Ash's rival Paul sets his eyes on capturing Gliscor. In the end, Paul captures the Gliscor on his team, and Ash captures one of the Gligar that keeps showing up.