I was always wondering about how many my fave nintendo game sold and here i found it
http://vgsales.wikia.com/wiki/Pokemon

Pokémon Red, Blue, and Green 31.37M
Pokémon Gold and Silver 23.10M
Pokémon Ruby and Sapphire 15.85M
Pokémon Diamond and Pearl 18.12M
Pokémon Black and White 15.42M
Pokémon X and Y 12.30M

Pokémon Ruby and Sapphire 15.85M

NOT this being one the lowest sellers, i'm PERCHED for meltdowns

Diamonds and pearl the first i ever bought
(Even though one of my friends gave his gameboy to me once a week and i was jamming )

BW

Poor XY!

The GBA itself didn't sell that much
RS are among the highest selling GBA games.. probably even the highest.
Doing the most as usual
----
XY sales are most likely outdated by now. they sold around 12 Million a few months ago.

but slay Nintendo/ Gamefreak

Well, this is according to the OP's fave games. Click the link to get FR & LG.

The originals stay winning

not Pikachu outselling all of our faves

Yellow - 14.64
Crystal - 6.39
FRLG - 11.82
Emerald - 6.41
Platinum - 7.59
HGSS - 12.67
BW2 - 7.81

Stadium - 5.45
Stadium2 - 2.73
Colloseum - 2.54
XD - 1.25
PBR - 1.53

Yasss at Platinum selling 7.59mil copies that **** was my ish

Ew at BW selling that much, trash (even though I contributed)

Pokémon HeartGold and SoulSilver 12.67
Pokémon FireRed and LeafGreen 11.82

The GP has spoken, the better remake after all (and also the greatest game in the main series)

Ki, Gen I slaying.

Oop not the "best games" in the series.

Pokemon Ranger outsold Pokemon Battle Revolution