That's the way Satoshi Tajiri made it. Trading was actually the inspiration for the game. (He imagined creatures crawling from one GB to the other on a link cable) Which is why lots of Pokemon in Gen I must be traded to evolve.
Haunter does not evolve into Gengar at a certain level. Haunter needs to be traded to another player. Once he is traded, he will evolve.
Yes. Haunter evolves into Gengar when traded.
To evolve haunter u have to trade it. As soon as it is traded it will evolve into Gengar.
Haunter will evolve into Gengar when it is traded. It doesn't matter what level it is, just trade it with someone and when they get it it will evolve into Gengar, then get them to trade it back to you.
yes, and gengar evolves from haunter after it is traded.
Gastly evolves into Haunter at level 25, then trade it and it will evolve again into Gengar.
haunter has to be traded to evlove haunter evolve into gengar in level 42
It evolves at lv.15 and can then learn shadow punch.
First, you need to catch a Ghastly, which can be found in the sprout tower or caves at night. Evolve it into a Haunter and then trade it. At that it will evolve into Gengar which you need to have it traded back to you.
A Haunter has to be traded to evolve. You have to trade it without it holding an Everstone and it will evolve into a Gengar. The Everstone will stop the evolution process.
In Pokemon Liquid Crystal, Haunter evolves into Gengar by trading it with another player. Once Haunter is traded, it will evolve into Gengar instantly.
gengar does not evolve