Making a secret base and decorating it in Pokémon Emerald/Ruby/Sapphire was so fun. Damn I really miss this. And I still have my saved file. : r/Gameboy
Underground Guide - Smogon University
Secret Bases in Kanto - Suggestion Box - PokeMMO
Pokemon Emerald: Coolest Secret Base Ever XD - YouTube
Secret Bases: Pokémon's BEST Side Feature - YouTube
Pokemon Scarlet & Violet trainers want one Gen 3 feature to return in Indigo Disk DLC - Dexerto
Pokemon Ruby, Sapphire and Emerald :: Guide to Making a Secret Base