Here are some exclusive Pokémon from the Johto Region that can be found in Pokémon Firered/Leafgreen
- Sentret
- Furret
- Ledyba
- Ledian
- Spinarak
- Ariados
- Crobat
- Pichu
- Igglybuff
- Togepi
- Togetic
- Natu
- Bellossom
- Maril
- Azumarill
- Politoed
- Hoppip
- Skiploom
- Wooper
- Quagsire
- Murkrow
- SlowKing
- Misdreavus
- Unown
- Wobbuffet
- Dunsparce
- Steelix
- Quilfish
- Scizor
- Heracross
- Sneasel
- Slugma
- Piloswine
- Remoraid
- Octillery
- Delibird
- Mantine
- Skarmory
- Kingdra
- Phanpy
- Donphan
- Tyrogue
- Hitmontop
- Smoochum
- Elekid
- Magby
- Blissey
- Raikou
- Entei
- Suicune
- Larvitar
- Azuril
- Wynaut