You can catch a Houndour in the Altering Cave in Pokemon FireRed.
It's in the lost cave
You can find Murkrow in the Lost Cave in Pokémon FireRed.
icefall cave on island 4
In Icefall Cave, in Four Island
Firered don't have a "solar cave"
You can get Mewtwo in the Cerulean Cave.
You can't
in the land cave.
bartonvilleType your answer here...
altering cave,
Cerulean Cave
mewtwo is in mystery cave :D
The only dark type Pokemon you can get in firered is murkrow which happens to be in lost cave on five island.
Cerulean cave
It is in Four island
icefall cave firered only