4780 Pokemon Heartgold Uxenophobia -

They often released digital versions of games days before the official street date.

Mid-game, you discover that Uxie, the Being of Knowledge, has been captured by a rogue ex-Team Rocket scientist. Using a modified Douse Drive, the scientist weaponizes Uxie’s amnesia powers to make Johto citizens that Kanto trainers ever helped them (e.g., forgetting Red’s victory over Team Rocket three years prior). The result: mass xenophobia. 4780 pokemon heartgold uxenophobia

Because this specific release became a standard "clean" base, it is frequently cited in the ROM hacking community as the required file for applying various fan-made patches. They often released digital versions of games days