You can't catch a Haunter in Emerald. You can trade for one, you can find a Duskull/Dusclops at MT Pyre, but you can't straight out find a wild Haunter.
Yes, Haunter is a very good Pokemon
You have to find your friend, you trade your Haunter with another Pokemon and when the trade is done Haunter will evolve.
You can find Haunter in SoulSilver in Route 8 at night. Additionally you can catch a Gastly at night in the Sprout Tower or the Bell Tower and then you can train it until Level 25 which is when it'll evolve into a Haunter.
You can't find gengar in the wild, you have to get a haunter and trade it.
look in the Pokemon tower in lavender for haunter. note, haunter is hard to find in the Pokemon tower
Haunter
Haunter can be found on Route 8 or in the Safari Zone.
you get it over a trade.
You can find wild haunters in Pokemon tower and lost cave.
Yes. you can find ghastly at lost tower or Eterna Forest. You can get haunter but i don't know where.
You can't catch a Haunter in Emerald. You can trade for one, you can find a Duskull/Dusclops at MT Pyre, but you can't straight out find a wild Haunter.
evolve gastly.
you cant you have to evolve haunter
Yes. If you plug in a GBA Pokemon game into your DS then play your DS Pokemon game, you will find an evolved haunter (gengar) in the purple painting in the old chateau
Yes, Haunter is a very good Pokemon
You have to find your friend, you trade your Haunter with another Pokemon and when the trade is done Haunter will evolve.