In Pokémon FireRed, Gastly evolves into Haunter at Level 25.
Ghastly will evolve at level 20.
you get it in lavender town in the Pokemon tower. you can also get haunter and cubone
You cannot evolve Murkrow in FireRed.
ditto does not evolve on firered or leafgreen
Haunter at level 25
yes into a haunter and the trade it to evolve into a gengar
Electabuzz is not able to evolve in FireRed.
Rhydon is not able to evolve in FireRed.
THEY DONT EVOLVE
Gahstly will evolve at lvl25 to Haunter then trade haunter to evolve to a Gengar.
You can't in order to get a gengar go to the Pokemon tower in lavender town and catch a ghastly then trade it to a friend or another gba and trade it back so it will evolve into a Gengar.
Ghastly evolves into Haunter at level 25, and Haunter evolves into Gengar when traded.