well it depends on which one u want if its yellow through red then its at mistys gym in the water
dowsing machine
In the water gym go behind one of the tubes speak to it
You can find him North of Cerulean, defeat him there and he will tell you where the Machine Part is.
when you find the machine, go upward into the cave, the machine does not affect the Pokemon in that part of the cave, go left, then right, and up, you will see a big boulder blocking another part of the cave, find squirtle, his ability will the geodude on the other side capture the Pokemon and break the boulder you will then find a gastrodon use soak on the machine and it will break.
no you can't because the power plant isn't abandoned in Pokemon gold remember you have to find the part for the machine you can catch it in Pokemon fire red or leaf green
After you get the part go to the Power Plant and give it to the guy near the machine
In pokemon gold you have to find first an itemfinder. Then go to the centre of the cerulean gym where there is a square type water is held. Surf in the water until you get the machine part. I know it would take time but believe me you will get there only.
Find the machine part in the cerulean city gym give that to the guy.
its a poketch app.
dowsing machine maybe
The Machine Part is in the Gym, next to the pool, by the inflatable tubes.
Aftnr u found the machine part for the powerplant speak to the copycats parents then speak to the copycat