It was filmed on a river in British Columbia, Canada, not a lake.
The big river scene was in Canada.
No
use AR max and use x999 masterballs, then 1st turn use master balls
i think you go to celistec town and go inside the ruins with uxie,mesprit and azelf in your party.then you click the door at the back and there might be someone or something inside.im not sure though.