(SGSS) are comprehensive ROM hacks of HeartGold and SoulSilver created by the well-known modder Drayano . Because these versions significantly overhaul the Johto and Kanto regions—increasing difficulty, adding all 493 Gen IV Pokémon, and altering mechanics—having verified documentation is essential for players, especially those attempting Nuzlocke challenges.
Example from doc (Falkner – Violet Gym): pokemon sacred gold storm silver documentation verified
If you are shiny hunting or team building, trust this data: (SGSS) are comprehensive ROM hacks of HeartGold and
This is the most common source of errors. Here is the list for Sacred Gold : adding all 493 Gen IV Pokémon