[crowf]

I may have missed it in the post, but how is blue different than red? I realise that they have slightly different Pokemon, but is that enough to make the emulator run only blue?

[binji]

Oops you're right, I should have mentioned that. Red works too, I just didn't want to write Blue/Red everwhere :)

[glhaynes]

In the spirit of the project I'm surprised you didn't pick "Red" because it's one fewer characters. :)

[northern-lights]

What about Yellow? If yes, you could shorted it as RBY which is more familiar to most old genners.

[Y_Y]

It probably needs less memory, since you only 8 bits to store blue but red needs 3.