Pokémon HeartGold Version and Pokémon SoulSilver Version games lets players continue to enjoy the world of Pokémon away from their Nintendo DS or Nintendo DSi systems, taking their favorite Pokémon with them wherever they go with the new Pokéwalker accessory. This new accessory will come included with each copy of these games.

In Pokémon HeartGold and SoulSilver Versions, players can wirelessly transfer any one of their Pokémon from one of the two games to the Pokéwalker and walk them through virtual routes as the player walks around in real life. By walking, players earn Watts, which are used within the Pokéwalker to encounter and catch wild Pokémon or search for hidden items, and can be transferred into Pokémon HeartGold and SoulSilver Versions to unlock new routes. There are even special versions of certain Pokémon that can only be found within routes on the Pokéwalker, giving players added incentive to keep their Pokémon with them wherever they go. The Pokémon in the Pokéwalker will gain experience points as the player walks, and can even go up one level when they are transferred back into the game. Players also can wirelessly connect two Pokéwalkers to trade items.

Letting players return to the beloved Johto region first introduced in Pokémon Gold Version and Silver Version for the portable Game Boy system, Pokémon HeartGold and SoulSilver Versions introduce several new enhancements for the series that enrich these timeless adventures. Created exclusively for the Nintendo DS and Nintendo DSi systems, the games feature detailed graphics that spotlight the unique environments and hundreds of Pokémon that players can encounter and catch. Players can even see and interact with their favorite Pokémon outside of battle, selecting one from their team to follow behind their Trainer as they travel through the Johto region. The games also include robust touch-screen functionality, allowing for smoother control and seamless navigation by the player.