Some newer hacks specifically require "Version 1.1" or European dumps, leading to checksum mismatch errors if you attempt to use the 4780 Xenophobia file. Reddit·r/Roms
specifically identifies the North American (U) version of Pokémon HeartGold . pokemon heartgold xenophobia 4780 link
It is considered a "standard" clean dump, making it the preferred base for many of the most popular ROM hacks, including and Refined Gold Overhaul . Technical Details & Use Cases Some newer hacks specifically require "Version 1