How do you evolve Haunter in the virtual console version of Pokemon Blue?

Question

I don't think you can use a Link Cable but I might plan on using Gengar some time soon so I'd like to know how you're supposed to evolve Haunter into Gengar in Pokemon Blue's Virtual Console.

Answer 1

You trade with a friend. Get someone you trust and go to any pokecenter, there you can activate the online features of the games, like the colloseum and trade center. Go to the trade center and trade them your Haunter and have them trade your newly evolved Gengar back.