If you're somehow not joking... Those are the Generation 1 and 2 Pokémon games, including (a fake copy of) Green, which only released in Japan. Also, you miscounted. There's 7, not 6. Red, Green, Blue, Yellow, Gold, Silver, and Crystal. (Although, why they didn't include Generation 3's games (Ruby, Sapphire, Emerald, FireRed, and LeafGreen) when they already have a GameBoy Advance, I don't know...)