Much like Pokemon FireRed and LeafGreen revisited the Generation I story of Kanto, HeartGold and SoulSilver will revisit the story of Johto, with the player's starting area being New Bark Town. While the games' feature several expansions in key areas, the overall plot follows the same direction as Gold, Silver, and Crystal. Like FireRed and LeafGreen could link up with Ruby, Sapphire, and Emerald to complete the Pokedex by trading regionally-exclusive Pokemon, HeartGold and SoulSilver can link up with Diamond, Pearl, and Platinum to obtain Pokemon unavailable in Johto and Kanto, such as Starly.

Three Great Pokemon Games for Pokemon Lovers
DS Emulator Included (NO$GBA v2.6a)

Games:
Pokemon Diamond
Pokemon Ranger Shadows of Almia
Pokemon Sapphire