My first Pokémon game was FireRed, which I got in first grade (at the age of 6). But, I stole another kid's game, and my mother made me give the kid my FireRed since I lost the one I stole. Two years later I got Emerald at the age of 8, and when I was 10 I traded another FireRed for a friend's Ruby, which I considered my second official game when I realized I started a collection out of those games. When I was 8 1/2 I convinced my mother to buy me Sapphire from Wal-Mart, which I promptly lost. :/
That Ruby is the only game I haven't replaced, although I do own a second copy of Ruby since my sister has a profile on the first one.
What a trip down memory lane that was~ :3