Pokemon: Season 1, Episode 32

1 - 32: The Ninja Poké-Showdown

Ash and the gang are lost in the forest when they stumble upon the famous Ninja Mansion. Little do they know that it is the next gym. They follow a Venonat who leads them right to Koga the gym leader. Ash battle him, but the get interrupted by Team Rocket. After defeating them with special power by Spyduck. Ash restarts his battle and wins his Soul Badge.