First Pokemon game?

[Nabber]

First one I got was Pearl.

 

[Soundless Voice]

:O

The first one I got was Pearl too.

 

[RandomYoshi]

If you mean the first Pokémon game overall I played, it is Pokémon Colosseum, but if you don't count those then they are Pokémon Black Version and Pokémon White Version.

 

[GalacticPetey]

Platinum

 

[Zae]

Blue.

 

[Time Turner]

FireRed.

 

[NotABannableOffense]

LeafGreen.

Surprisingly hard to beat at the age of 5.

 

[yoshidude99]

Gold

 

[marioman1213]

Pokemon Ranger Shadows of Almia

 

[Yoshiwaker]

FireRed.

^

 

[vvooper]

Yellow :D

 

[Toad Eightyfive]

Black.

 

[Smashley]

As far as the "main" games, my first was Gold.