Ghastly is the name of a Pokémon that is Poison-type and Ghost-type at the same time. It has two evolutions known to date. The first one is Haunter, in which Ghastly becomes once it reaches level 25. Once as Haunter, it can be evolved to Gengar through Trade with another trainer.
To evolve the Pokemon Ghastly you must train the Pokemon up to level 25 where it will evolve into Haunter.
Ghastly will evolve at level 20.
it will evolve at lvl 25
yes into a haunter and the trade it to evolve into a gengar
Evolve Ghastly. Ghastly can be found at White Forest. Evolve it into Haunter at level 25 and then evolve Haunter into Gengar by trading Haunter.
Haunter at level 25
Gahstly will evolve at lvl25 to Haunter then trade haunter to evolve to a Gengar.
Ghastly evolves into Haunter at level 25, and Haunter evolves into Gengar when traded.
Ghastly evolves at a level 25.
In Pokémon FireRed, Gastly evolves into Haunter at Level 25.
Level 25 into Haunter, then trade to make it Gengar
Ghastly to Haunter is 25. Haunter to Gengar you'll have to trade it with a friend.
25 into Haunter and then if u trade Haunter he evolves into Gengar