turn back cave
You trade haunter to get gengar.
Haunter evolves when traded
Some lady in a city will trade you it but it will stay as haunter.
Haunter evolves only by trading to another game.
Actually, Haunter does evolve. Its evolves into Gengar when you trade it.
gastly, haunter, gengar
you get it over a trade.
Nothing, to evolve haunter you have to trade him...
trade
25 into Haunter and then if u trade Haunter he evolves into Gengar
yes
You trade Haunter it it will become a Gengar.