5 Island
Pokemon Tower
(trading one can be done at any upstairs Pokemon center with a friend)
IMPROVED: You can't trade with anybody in the game, but if you have the adapter you can with a friend. Once you trade a haunter he will evolve in to a gengar. That is the only way to get a gengar. hope this hepled
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No you must trade from FireRed and LeafGreen
To get a Gengar you must first catch a Haunter. To evolve the Haunter you have to trade it to another gaming system.
It will evolve if you trade it to someone else.. After the trade has been made, it will evolve to Gengar
You mean how you get Gengar then train a gastly to level 25 it will evolve to Haunter then trade to a friend who has firered or leafgreen your haunter and then take it back when you receive it it will be a gengar.
You evole haunter by trading it with a friend :D