you have to get a cable on the game boy and go to the Pokemon centre with haunter and get your friendwhich you connected with and press the trade button and select the Pokemon you want to trade
Yes, Haunter is a very good Pokemon
you have to trade him. If you have anyother questions on Pokemon go to serebii.net.
Haunter is a ghost type Pokemon
look in the Pokemon tower in lavender for haunter. note, haunter is hard to find in the Pokemon tower
You trade haunter to get gengar.
Haunter evolves when traded
Trade Haunter and you will get a Gengar.
misdreavus , haunter, castform. Rotom sadly it is the only one. to get it 'talk' to the tv in one of the rooms. he's lv15
You can get a Haunter in Almia Castle.
you can't find haunter in Black
You will need to level up Haunter to level 50 to evolve it in Pokemon Resolute.