To "prepare paper" for a new save file in Pokémon HeartGold (specifically the US version, often indexed by the release number 4780), you must first manually delete the existing save data before the game will allow you to save a "New Game." 1. Deleting the Existing Save Data
Current Availability: You can find listings for this game on platforms like eBay or through retro specialty stores like DKOldies. The HeartGold / SoulSilver Experience | Peak Remakes
Anti-Piracy (AP) Patches: The 4780 ROM initially featured rigorous AP measures that caused the game to freeze randomly. Most modern emulators and flashcart kernels now auto-patch these issues.
: Any Pokémon in your party can follow you in the overworld, allowing you to interact with them as they "tag along" behind your character. The Pokéwalker
And one by one, they began to walk.