Brock is ready to travel again and has joined up with Ash, May and Max as the journey on towards Rustboro City. In the forest they encounter a giant Zigzagoon, which they soon realize is actually a trainer in a Zigzagoon suit. Nicolai the Knickerbocker is a trainer that believes in becoming one with Pokémon in order to understand them. While battling, he wears a costume of whichever Pokémon he is using. When not dressed as a Pokémon, he wears knickers in order to be closer to nature.

Deep in the woods, Ash spies a Treecko. He's wanted to catch a Treecko since he first saw one at Professor Birch's laboratory. He follows the Treecko to an enormous tree that seems to be dying. There, Ash's Treecko has an argument with all of the other Treecko.