1. The new released for the new pokemon original game is always released 2 new game at the same date ( red & green, silver & gold, ruby & sapphire, diamond & pearl, black & white, x & y.)
2. All pokemon original game always has a 1 more version later after the release of the 2 new gen game or after the old gen remake. Excepted the pokemon black and white has 2 more version and same game name just added 2 for the name. ( blue, crystal, emerald, platinum, black 2 & white 2, z?)
Note: pokemon x & y version don't have the new version for the game now. Maybe it will be released pokemon z or pokemon x 2 & y 2 in 2015
3. The game box is featuring the image for the main legendary in the game. Excepted pokemon red, green, blue, yellow, fire red, and leaf green
4. The new game for the new gen is always released in another console. Excepted pokemon black & white. ( red & green GB, silver & gold GBC, ruby & sapphire GBA, diamond & pearl NDS, black & white NDS, x & y 3DS.)
5. Pokemon yellow is the only one special version for the pokemon original game.