You can find various listings for the game on platforms like eBay or Amazon for those looking to add it to their collection. Pokemon Heart Gold Guide - Part 1 - Back to the Past
: The game features completely overhauled visuals and audio compared to the original 8-bit versions. 4851 - Pokemon - Versione Oro HeartGold
: Originally, the physical game came bundled with the Pokéwalker, a pedometer that allowed players to transfer a Pokémon to it and level it up by walking in real life. You can find various listings for the game