you trade him, he evolves
Gahstly will evolve at lvl25 to Haunter then trade haunter to evolve to a Gengar.
It evolves into Haunter at Level 25.
you trade him. and he will evolve into gengar. you trade him. and he will evolve into gengar.
he evolves by trading him
None!
You have to trade to another game to make it evolve.
you can trade it at the guy at snowpoint city
Gastly evolves to Haunter at level 25. Then, Haunter evolves into Gengar by being traded.
You trade Haunter to another Diamond, Pearl, or Platinum version and it will evolve into a Gengar. You will need to trade back to your original Diamond game to get the Gengar. Hope I helped, bye
Haunter doesn't evolve at any level to evolve your haunter you need to do a link trade with a friend and he he will then evolve
No it won't Haunter only evolves when you trade across to a similar game, you have to trade it to Leaf green for it to evolve. It will migrate to Pokemon platinum and will stay as a haunter. To evolve it to a Genger on platinum, you must trade it to another platinum, diamond or pearl
You evolve it into Haunter at Level 25. To evolve Haunter into a Gengar, you need to trade it.