Pokémon: The Series Rewrite:Indigo League Part 1

episode 23: haunter versus kadabra

Ash learns that a Haunter had been following him since his experience in Lavender Town and decides to use Haunter to help him take down Sabrina. Ash defeats Sabrina by making her laugh and Ash saves his friends. Haunter decides to join Ash's team and is caught by Ash.