It's impossible to find in the wild. You need to evolve Haunter.
Gengar is a powerful ghost type of Pokemon. In Pokemon Platinum it is possible to capture one by going to the Old Chateau.
you cant you have to evolve haunter
you find gengar in the creepy house in enterna forsest or just trade or use a ar or evolve it hope this helps :)
you have to trade a haunter and it will evolve into gengar.
if u have a gengar the move tutor can teach it to it
If you have Fire Red in your DS, go to the Old Chateu.
Psychic Bryce has a gengar in Pokemon platinum.
Using the dual-slot feature with firered or leafgreen will make it possible to find gengar in the second room from the right on 2F
if you want the pokedex entry go to victory road go passed the first biridge and then use rock climb at the left there will be a trainer with gengar. if you want your own gengar trade a haunter
A trainer in Victory Road has a Gengar.
Using the FireRed Dongle method, in Diamond and Pearl you will find Caterpie, Metapod, Ekans, Arbok, Growlithe, Elekid and Gengar and in Platinum you'll find Caterpie, Metapod, Ekans, Arbok, Growlithe and Gengar.
You can't find Gengar in the wild, you have to trade with a person for haunter and it evolves into gengar.you cannot find a gengar in the wild but you can get its early form gastly in sprout tower , violet city at night in the game