Without a doubt, Ash's closest companion throughout his journey was Brock. Brock appears in over 500 episodes of the Pokémon anime, a feat shared by only Ash, Pikachu, and Team Rocket.

Ash, Brock, and May continue their journey through ... earning Ash's admiration. RELATED: Pokemon Anime: Best Kanto Episodes When the tree ultimately collapses, Treecko joins Ash on his journey.

A group of injured Pokémon, challenges Brock to develop new skills. In the Sinnoh League semi-finals, Ash faces Tobias, a Trainer he’s heard a lot about.