If you manage to find the original IPS patch (do not attempt this on your main hardware), applying it to a HeartGold ROM (Rev 1) results in a fundamental rewrite of the NPC interaction engine.
: Many early versions of the Xenophobia dump would cause the game to freeze randomly or prevent players from gaining experience points. 4780 pokemon heartgold uxenophobia
When a player enters a battle with a Pokémon in the lead slot: If you manage to find the original IPS
If I had to create a post based on this topic, here's a possible draft: here's a possible draft: