How to evolve Haunter in Cobblemon.
Haunter evolves into Gengar when traded to another player, or when you use a link cable on it.
Evolution line
What Haunter needs
1 path
GengarLink cable or trade
no extra condition
Moves it learns on evolving
Shadow Punch
These are offered the moment the evolution completes. Decline them and you have to relearn them later.
Is it worth it
Haunter nowghostpoison405
Gengarghostpoison500
Base stat totals, from the Cobblemon 1.7.3 species files.