Pokemon you won't find in
Yellow: Weedle, Kakuna, Beedrill, Ekans, Arbok, Raichu, meowth, Persian, Koffing, Weezing, Jynx, Electabuzz and Magma.
Red: Sandshrew, Sandslash, Vulpix, Ninetales, Meowth, Persian, Bellsprout, Weepinbell, Victreebel, Magma and Pinsir
Blue: Ekans, Arbok, Oddish, Gloom, Vileplume, Mankey, Primeape, Growlithe, Arcanine, Scyther and Electabuzz.