Crobat Shiny - Moemon Fire Red by Frost696Bite on DeviantArt
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Altering Cave - Bulbapedia, the community-driven Pokémon encyclopedia
Pokémon FireRed & LeafGreen - Altering Cave
Pokemon FireRed ULTRAWIDE: Outcast Island & Altering Cave (No Commentary) - YouTube
Reggie-800's Nintendo Secrets on Twitter: "Altering Cave: FireRed & LeafGreen contained 46 Johto Pokemon, but were originally planned to have 59. That's because a small cave in the Sevii Islands was supposed
Altering Cave - Bulbapedia, the community-driven Pokémon encyclopedia