gastly evolves at level 25. for gengar you have to trade
gastley evolve's at level 25 trade hunter to get gangare
it evolves at level 25 into haunter then you trade it to someone and it will be a gengar.
No you have to Evolve Gastely into a Haunter then trade it with one of your friends to get Gengar, you need the kings rock on a slowpoke and trade as well to get a Slowking
Gastly evolves into Haunter at level 25, then trade it and it will evolve again into Gengar.
go to haunted mansion gastley has mean look.
go to the sprout tower in the town where you get the first badge at night.
You can get Gastly only by trading from Fire Red/Leaf Green it's in Lavender tower.
use gastley as a ghost Pokemon and us its poke assist
The first place you can find Ghastly is in the Sprout Tower located in Violet City.
Trade a Graveler in Jubilife City in the Global Trading Center and it will involve after the trade.
You can geta charzerd,pichu,mew,mewtwo,gastley,hauter,pickachu,piplup,turtwig,and slowking.
You can catch gastlys in all of the following areas: Sprout Tower Burnt Tower Union Cave Dark Cave Hope this helps