In the Diamond version of the Pokemon games for Nintendo Gameboy, wild Gengar can be found in the Old Chateau in Eterna Forest in the Sinnoh region. The Gengar in this region are usually level 16 or lower in the Diamond and Pearl versions of the game.
ive been looking through other related answers ppl seem to say you cant catch them wild well.. i answered a question with full instructions on how to catch gengar ill repeat it right here for your benefit
you must have firered,leafgreen,emerald or sapphire in gba slot and you need the national dex if you actually want gengar or this will be a waste of ur time
wat u need in stock dusk balls maybe heal balls if u want quik balls nest balls etc just to be safe get about five of every ball available in the market
wat Pokemon you need any with the move cut
this is easier than coming from floarama town come from eterna don't go through two trees go to one above then theres 3 trees u cut one then go to the house go upstairs on the right go to second last room to painting with eyes are there and theres shadowy walkline in front and along the side of the wall don't go to the wall looking for gengar straight in front of the painting go along the side until you find gengar then use the appropriate balls to catch him you would be very lucky to catch him with full hp
this is the only way to catch him without trading or action replay email me if you want more details about it
first get Gastly at the Old Chute in Enersha forest and evolve it in to Haunter then trade it to a friend and it will evolve into Gengar then tell your friend to trade it back (Haunter evolves by trade)
In Pokémon LeafGreen in order to receive Gengar in the game you will need to catch Gastly in the Lost Cave or in the Pokémon Tower and then you would have to raise it until it evolves into Haunter at Level 25 and then you would have to trade Haunter over to another player in order to evolve it into Gengar, another option is to catch Haunter in the Lost Cave or in the Pokémon Tower and then trade it to another trainer in order to evolve it into Gengar.
I am pretty sure the only way to get a Gengar in Leaf Green is to catch a Gastly from the Pokemon Tower in Lavender Town and then get it to evolve into Haunter, and then Gengar.
You have to trade your hunter, by the time being traded it will evolve in to gengar!
Trade a Haunter from either Fire Red or Leaf Green, or use a GameShark/Action Replay code.
talk to the gengar painting. when he comes out talk to himn then fightem
You'll need to trade for Haunter in order to evolve it or trade for Gengar originally.
Through trading a haunter with someone else
Haunter
Take a gengar to her and you'll find out
Gengar is the fastest Ghost type pokemon.
you get him someow in the lost tower
gengar
You'll need to trade for a Haunter or a Gengar in the GTS or from someone.
Haunter
Take a gengar to her and you'll find out
To get a Gengar, you must trade a Haunter and it will then evolve into a Gengar.
you cant find gengar if you not have steal trainers Pokemon cheat
gengar can defeat any Pokemon same with any other Pokemon
Gengar is a Ghost-Poison type.
gengar can be found on the temple when you figth raiko
gengar cannot evole :P
Psychic Bryce has a gengar in Pokemon platinum.
in blue gengar in red nidorino.
you need to trade it to get it into Gengar