Pokémon Sacred Gold and Storm Silver , a key "extra quality" feature for Pokémon locations is the comprehensive documentation provided by the creator (Drayano)
This is the "Extra Quality" secret sauce. In specific trees and caves (marked by a slightly different tile color), there is a 5% chance of a "Hidden Grotto" that contains: Pokémon Sacred Gold and Storm Silver , a
"Why are they here now?" Mina asked.
New Bark Town: Surfing yields Tentacool (90%) and Tentacruel (10%). Using a Super Rod from the Scribd Item Guide allows you to catch Lanturn (30%) and Shellder (60%). Dratini (from Dragon’s Den elder – requires quiz)