This is the second version of the Cyber Poké Ball, a simple RPG set in the Pokémon universe and contained within a handheld shaped like a Poké Ball. The units come in several colors and patterns. In the game, players explore a map to find wild Pokémon and battle them. A weakened wild Pokémon can be captured and added to the party; the player may own a maximum of three Pokémon at a time. Pokémon automatically evolve upon reaching certain level thresholds. Players may challenge area bosses, which will grant access to new parts of the world upon their defeat. They may also use the device's connectivity features to battle other nearby players. Special chips, which came packaged with various Pokémon toys made by Bandai, could be inserted into the device in order to access new content.
The Pokéwalker is a pedometer device specifically for use with Pokémon HeartGold and SoulSilver that is able to interact with the games in various manners. It was released in Japan on September 12, 2009 bundled with every copy of Pokémon HeartGold and SoulSilver, and then later released with every localized copy of the games. The accessory has a Poké Ball design with a small monochrome LCD screen and three functioning buttons. The Pokéwalker supports infrared signals allowing players to interact within a short range with a game card of Pokémon HeartGold or SoulSilver while slotted in the Nintendo DS, or with another Pokéwalker.
The system records every time a step is taken, and the daily step count influences which wild Pokémon and items will appear. The player can transfer a Pokémon to the Pokéwalker from either HeartGold or SoulSilver, which gains experience for each step. Like the Pokémon Pikachu and Pokémon Pikachu 2 GS, the Pokéwalker uses a currency known as "Watts" (shortened to w); every 20 st