Its on five island in the north use the move surf to get there go north to resort gorgeous then head east until you see it.
Get a tutorial on you tube
It's in the lost cave
Gastly, Haunter and Murkrow.
The only dark type Pokemon you can get in firered is murkrow which happens to be in lost cave on five island.
In the lost cave in island 5
you find lost cave on leaf green on 5 island. after resort gorgeous.
You can find Murkrow in the Lost Cave in Pokémon FireRed.
Just keep running around and you will eventually find one. It does take a while for Pokemon to appear in the lost cave. Murkrow is RARE in the lost cave so you won't find it easily. It can only be caught in the Firered lost cave and Misdreavus can only be caught in the Leafgreen Lost cave. You cannot get Misdreavus anywhere in Firered. It is absolutely exclusive to Leafgreen.
we dont now
Firered don't have a "solar cave"
You can get Mewtwo in the Cerulean Cave.
You can't