You can trade a Medicham to a woman in Snowpoint City in exchange for a Haunter. As the Haunter is holding an Everstone, it will not evolve into a Gengar after the trade.
Yes, unless you ask the person you are trading with, to cancel the evolution.
The last person of the Elite Four in Pokemon Platinum is Lucian, the master of Psychic-type Pokemon. After him is Cynthia, the Champion.
none of them
Fantina
Tristin F. was the first person in America to beat Pokemon platinum. She beat it on Nov. 7, 2009.
In the house next to the Pokécenter in Eterna City.
You have to migrate them, or trade with a person who migrated it.
if the other person wants to trade there haunter to evolve and haunter evolves when you trade it
shout Pokemon at the screen. i hate the person that put this probaly
porygon and a person has it on route 214
You trade in the union room with another person.
you can battle a person in victory road.