you have this in the wrong category
Battle
Go to the Meeting Place.
No, not in the immediate game anyway. But you might be able to make him appear by using a code. search pokemon park wii pikachus adventure on google and you will have many different sites pop up.
in the green room in the haunted house
In the Beach Zone ,not that close to the Drifblim Stop
Near where marowak is keeping the berries.
ask him to chase you and you will have a success of friendship
Well you get it at the beach zone
No, you can't see mewtwo in pokepark wii
go talk to glalie and go from there
they don't exist in pokepark.they are only in the mountain.
I got mine for about $50. Maybe if you wait a while, the prices will decrease.