While Pokémon HeartGold (released in 2009 for the Nintendo DS) does not have a built-in QR code scanner like the later 3DS titles (Sun & Moon), QR codes are frequently used by the community for Event Distribution and Action Replay emulation. 1. The Poke-Ventrue: Event Distribution
For users with a "modded" Nintendo 3DS, QR codes are a popular way to install digital copies of games. FBI Installer: Pokemon Heart Gold Qr Code
Configure Connection: Open HeartGold and select Nintendo Wi-Fi Connection Settings from the main menu. While Pokémon HeartGold (released in 2009 for the
If the DNS exploit fails (due to Wi-Fi security issues), you can use a cheat device. This does not involve QR codes, but you will find many QR images online that contain these codes as text. You find a trusted database hosting the HeartGold ROM