Xenophobia (XPA) was a prominent console scene release group active in the late 2000s and early 2010s. They were famous for dumping Nintendo DS games.
The release group Xenophobia released the US version of HeartGold with an anti-piracy (AP) check active. When the game detects it is not running on authentic retail hardware, it triggers freezing mechanics (specifically when walking through doors or during certain text events) to make the game unplayable.
The group's name was a cheeky nod to the nature of video game releases at the time. Many games were released in Japan or Europe long before North America. The group often released USA versions of games that had been out elsewhere for months. The name "Xenophobia" (fear/hatred of foreigners/strangers) was an ironic joke about region-locking and the delayed North American releases. 4780 pokemon heartgold u %29%28 xenophobia
An unused debug event in the Pokémon HeartGold code (US version), index 4780, triggers a hidden behavioral flag called the Xenophobia Protocol.
Originally intended for a canceled "Rival’s Despair" event, the unfinished script causes NPCs and wild Pokémon to react with irrational hostility toward any foreign (traded or out-of-region) Pokémon.
Target ROM: 4780 - Pokemon HeartGold (US)(Xenophobia)
Common Issues: Xenophobia (XPA) was a prominent console scene release
If you are playing on a computer emulator (like DeSmuME) and do not want to download a pre-patched ROM, you can bypass the anti-piracy check using a cheat code.
How to use:
020DE16C E1A00000
020D3FA8 E1A00000
This code nullifies the anti-piracy routines, preventing the random freezes and allowing the game to progress normally.
Some fan-made ROM hacks use numbers in their titles (e.g., Pokemon Dark Cry: The Legend of Giratina has version numbers). “4780” could be a build number for a hack that addresses xenophobia thematically. However, no known HeartGold hack uses that number. Target ROM: 4780 - Pokemon HeartGold (US)(Xenophobia) Common