Pokémon FireRed and LeafGreen Versions - Bulbapedia, the community

Ninetales (Pokémon) - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon FireRed and LeafGreen Versions - Bulbapedia, the community-driven Pokémon encyclopedia

List of items by pocket (FireRed and LeafGreen) - Bulbapedia, the community-driven Pokémon encyclopedia

Memory P - Bulbapedia, the community-driven Pokémon encyclopedia

Pokémon FireRed and LeafGreen, Nintendo, Fandom

Slowpoke (Pokémon) - Bulbapedia, the community-driven Pokémon encyclopedia

Appendix - FireRed and LeafGreen Walkthrough - Section 6 - Bulbapedia, The Community-Driven Pokémon Encyclopedia4, PDF, Pokémon

National Pokédex - Bulbapedia, the community-driven Pokémon encyclopedia

Rival - Bulbapedia, the community-driven Pokémon encyclopedia

Two Island - Bulbapedia, the community-driven Pokémon encyclopedia

Pokemon FireRed LeafGreen Event Distribution Service: Mystic Aurora Ticket Mew

So Bulbapedia has this section of unreleased characters based on supplementary material or in the game itself. Some of them I understand why they are here, but others I don't. Can someone

Stupid Theory: Is The Island in Alola's Map Four Island From Fire Red And Leaf Green? : r/pokemon

Appendix:FireRed and LeafGreen walkthrough/Section 15 - Bulbapedia, the community-driven Pokémon encyclopedia

Birth Island - Bulbapedia, the community-driven Pokémon encyclopedia