Get a Haunter and trade it with a friend in the Union Room, then it will evolve into Gengar if it doesn't have an everstone.
Chat with our AI personalities
you trade him. and he will evolve into gengar. you trade him. and he will evolve into gengar.
Haunter evolves into Gengar by trading. Since the GTS is not functional in Pokemon Diamond and Pearl anymore, you will need to ask a friend, who has a copy, to do a trade-back with your Haunter.
Drifblim, Gengar, and Mismagius
You can't find gengar in the wild, you have to get a haunter and trade it.
no