Blue (Trainers)

Blue Oak is a Pokémon Trainer from Pallet Town, Kanto, and the rival to both Red and Leaf. He serves as the tritagonist of the First Journey series.

Kanto
Red and Leaf first meet Blue in Professor Oak's Lab, where he gives the three a starter Pokémon. Blue chooses Eevee as it is the only one remaining, after Red chose Pikachu.

Later, after receiving the Pokédex, Blue sets out to find every Pokémon and be one step ahead of Red. As Red and Leaf progress through the series, they encounter Blue in several locations and have to battle him every time.

Kanto

 * Boulder Badge