Yes, Haunter is a very good Pokemon
Chat with our AI personalities
Haunter evolves when traded
Trade Haunter and you will get a Gengar.
Haunter is a Pokemon that relies on special attack, so this isn't a good idea. Payback is a physical attack, so it's not a good idea to teach it to a Pokemon who has a higher special attack than attack.
you can't find haunter in Black
You will need to level up Haunter to level 50 to evolve it in Pokemon Resolute.