This is a list of the teams of the rival in Pokémon Yellow. As this game uses non-traditional starter Pokémon, Blue will start with Eevee. Blue will evolve his Eevee into either Flareon, Vaporeon or Jolteon depending on the result of his battles against the player.
- Vaporeon: Blue defeats the player at Prof. Oak's lab. Either Blue defeats the player or the player skips the battle at Route 22.
- Jolteon: The player defeats Blue at both Prof. Oak's lab and Route 22.
- Flareon: The player defeats Blue at either Prof. Oak's Lab or Route 22, while losing or skipping the other battle.
First battleSecond battle (optional)Third battleFourth battleFifth battleSixth battleSeventh battle