Platform: GameBoy Advance
Release date: September 9, 2004
Sure, FireRed and LeafGreen were basically updatede remakes of Pokémon Red, Green, and Blue, but this was a GameBoy Advance we're talking about. Pokémon has endured through more than two decades of shifting technology, trends, and tastes. And if last year's Pokémon X & Y is any indication, the series isn't going anywhere anytime soon.
FireRed and LeafGreen sold over 12 million copies at the time of their release.