Red, Blue, and Yellow Version Exclusives
Not all the Pokémon are available in every game. They have to be traded from another game, or obtained through a cheat, if you're inclined to use such methods to get your hands on these Pokémon. This page will show you what Pokémon aren't available in the original games.
Unavailable in Red
Sandshrew, Sandslash, Vulpix, Ninetales, Meowth, Persian, Bellsprout, Weepingbell, Victreebel, Magmar, Pinsir
Unavailable in Blue
Ekans, Arbok, Mankey, Primeape, Growlithe, Arcanine, Oddish, Gloom, Vileplume, Scyther, Electabuzz
Unavailable in Yellow
Weedle, Kakuna, Beedrill, Ekans, Arbok, Meowth, Persian, Koffing, Weezing, Jynx, Magmar