Pokémon Sacred Gold & Storm Silver (SG/SS) are widely considered the gold standard for Johto enhancement hacks. Created by Drayano, these hacks transform HeartGold & SoulSilver into a significantly more challenging experience where all 493 Pokémon (up to Gen IV) are obtainable in a single playthrough.
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Avoid YouTube videos promising "link in description" that lead to dead links. Here are the top three reliable sources for live documentation: pokemon sacred gold storm silver documentation top
The ROM hacking scene moves fast. Many old guides on Pastebin are for outdated beta versions (v1.0.1). Here is how to find the top, most accurate documentation for Version 1.0.5: Pokémon Sacred Gold & Storm Silver (SG/SS) are
Trainer Rosters: Crucial for Nuzlocke runs, this doc lists the movepools and items of every Gym Leader and major boss. For example, Falkner's team is significantly more diverse than the original game . Top Tip: The documentation lists their exact movesets