O.O.P.P.S. Challenge: Pokémon Blue Part 2

Join me for the O.O.P.P.S. challenge.

The O.O.P.P.S. challenge stands for Only One Pokémon Per Species. I'm playing through the Pokémon main series but I'm only allowed to use one Pokémon species per game. For example: if I use Charizard in Pokémon Red, I cannot use Charmander, Chameleon or Charizard in any other game. I can use a HM whore Pokémon but I'm not allowed to battle with it.