Talk:Shiny Pokémon/@comment-64.231.243.247-20120529175844/@comment-4700359-20120606015737

Any level without catchable Pokémon (most of the Gym levels, Lavender Town, the Zapdos boss fight, etc.) cannot spawn Shinies. Unknown Dungeon and Cinnabar Island, however, can and will produce Shinies, I speak from experience.