By getting a water type Pokemon & teaching it surf
you go to route 9 and in the grass This is in soul silver only Heart gold players
go to route 47 and use surf on the water there go to the left until you see land
When you return the machine part to the power plant.
go to denver
you can go to the mt silver
You go outside :)
go to icefall cave
South.
bummbummbumm
PC box
i have no clue
kanto ,joto