When he does
Gastly evolves into Haunter at level 25, then trade it and it will evolve again into Gengar.
Gastly evolves into Haunter at Lv25.
You don't need to get a gastly to evolve because you can catch haunters in Pokemon tower
yes if it doesn't have an everstone
when its level 8.you wont see it in the the moves so just evolve it from gastly. gastly evolves at level 25.It shouldn't take that long....
gastly evolve on level 25
haunter then gastly
To evolve Gastly into Haunter just get it up to level 25.
Gastly evolves at LV. 25
You can't use a stone on gastly to make it evolve it evolves at level 22.
Gastly evolves into Haunter at level 25, then trade it and it will evolve again into Gengar.
Gastly evolves to Haunter at level 25.
Gastly evolves at Level 25.
Gastly evolves at level 25.
In Pokémon SoulSilver, Gastly will evolve once it hits Level 25.
Gastly evolves at level 20 into Haunter
Gastly evolves into Haunter at Lv25.