In this case, no - Pokémon Red+Green were the two games released together in Japan, and Blue was a special edition released later. When it came out in the US,

In this case, no - Pokémon Red+Green were the two games released together in Japan, and Blue was a special edition released later. When it came out in the US, they based Red and Blue on the updated code+artwork from Blue, but with the catchable Pokémon split that was there between JP Red/Green (e.g. Electabuzz/Magmar were exclusive to JP Red/Green and US Red/Blue, respectively). (This is also why on, say, Bulbapedia the sprite lists for Gen 1 list "Red/Blue", "Yellow", and "Red/Green" as different entries.) (I _think_ it was just that they preferred the red/blue contrast? I'm not sure I ever heard a definitive answer why, other than perhaps the fact that they mashed up the Blue and Green version.)