This is a list of the teams of the rival in Pokémon Yellow.
As this game uses non-traditional starter Pokémon, the rival will start with Eevee. Eevee will evolve into Vaporeon, Flareon, or Jolteon, depending on the results of two early battles against the player: the first battle at Professor Oak's lab in Pallet Town and the optional second battle on Route 22.
- Vaporeon: The player loses against the rival at Professor Oak's lab
- Flareon: The player wins against the rival at Professor Oak's lab, but loses or skips the battle on Route 22
- Jolteon: The player wins against the rival at both locations
In the fourth through seventh battles, Blue has a Potion for each of his Pokémon that he uses 12.5% of the time if the HP falls below 20%.
In the Champion battle, he instead uses Full Restores with the same logic.