Recently acquired these “Not for Resale”Pokémon HeartGold & SoulSilver Versions. Probably the most expensive Ds games I've ever purchased : r/NintendoDS
Pokemon HeartGold Version - IGN
Pokemon HeartGold Version Nintendo DS Game Case Authentic Cartridge Heart Gold 45496740641 | eBay
Pokemon HeartGold Version Box Shot for DS - GameFAQs
Pokemon Heart Gold and Soul Silver | The Completionist - YouTube