To get the fifth badge in Pokémon FireRed and LeafGreen version you have to beat Koga. He uses poison type Pokémon.
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You go to Saffron City, go to the Silph Co., take out Giovanni, then beat Sabrina
It is not possible to get a ninth badge in Pokemon FireRed. You can only get eight badges in Pokemon FireRed.
The 7th badge.
island? the fourth badge is in celadon
Soul Badge (Fuchsia Gym)