Ash comes across a place where he can't catch pokemon. He takes over in a race for an injured woman. It takes a while to learn how to ride.
In the race one competitor beat everyone but him by cheating. Ash countered his cheating and ended up in a pokemon battle against Team Rocket half way through.
But they're team rocket. At worst they slow him down. He goes after defeating them and charges forward with Ponyta.
Evolving it into Rapidash. It uses flame charge and rushes to the finish line. Winning the race.
(A/N. this episode was very forgettable.)