They evolve by trading.
you have to trade with a person his hunter with you then he will evolve
if you have a medicham you can trade a girl in snowpoint city for a hunter and it'll evolve into a gengar. Or, you can trade a hauntur with another trainer and it will evolve.
yes by trading
you can't
Hunter dosent evolve at a specific level it evolve if u trade him.No item is necessary to hold.
To evolve Gastly into Haunter just get it up to level 25.
you and a friend link up an trade hunter for hunter then both of you get the relly strong pokemon ginggar
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Haunter doesn't evolve at a level. It evolves by trading with another trainer.
Any level! You just have to trade it, to evolve it!
gastley evolve's at level 25 trade hunter to get gangare
haunter evolves into genger by being traded you only can it evolve by trading your haunter