Pokémon — Episode 29: The Wacky Watcher!

You are watching the episode The Wacky Watcher! On Rind Island, Tracey meets Dr. Quackenpoker, a noted Pokémon Watcher who is doing a study on the Magikarp that climb up waterfalls and how they evolve into Gyarados. However, Team Rocket appears to steal the Magikarp and get them to evolve.