you need to trade it to get it into Gengar
It wont evolve unless you trade it.
There is no certain level you have to trade it to evolve it
Haunter will evolve into Gengar when it is traded. It doesn't matter what level it is, just trade it with someone and when they get it it will evolve into Gengar, then get them to trade it back to you.
gengar does not evolve
It doesn't evolve. Gengar is a final evolution.
To evolve haunter u have to trade it. As soon as it is traded it will evolve into Gengar.
Gastly evolves into Haunter at level 25, then trade it and it will evolve again into Gengar.
Level 25 into Haunter, then trade to make it Gengar
Gahstly will evolve at lvl25 to Haunter then trade haunter to evolve to a Gengar.
It only evolves through trade.
You have to trade the Haunter to evolve. I learned the hard way. It got to level 59 and I traded..... it evolved!
Gastly > lvl 25 > Haunter > trade evolution > Gengar