Because it is a "clean" dump, 4780 is the standard base file for applying patches for popular fan-made games: Sacred Gold & Storm Silver: High-difficulty hacks by Drayano. HeartGold Generations:

: This number is frequently used when searching for specific save file patches, cheats (like Action Replay codes), or when verifying the authenticity of a digital copy. The "Uxenophobiands Top" Mystery