surf under mauville city. you have to go under the cycle path. You then enter a cave with the generator at the end of the cave
go to the crulean jym and go to all the way to the left of where misty is supposed to be and then go down nearest to the water and press a
South of Rock Cave.
Return the missing part to the Powerplant He will then let you in
Power Plant
Kanto,at the power plant.Once you've retrieved the missing part of the generator,come back and once you've gone somewhere else and buy a ton of ultra balls. Note:Zapdos does know Safegaurd so you might get a little ticked of if you're trying to put it asleep
he gives you the missing machine part for the generator at the power plant :) hope i helped :D
the director will give u after giving the missing generator part to the manager . he will be in the radio tower of levender town
part of team rocket
you buy it .
dowsing machine
If you have already been to the powerplant then head back to Cerulean city and walk to the gym. A team rocket grunt will come out and run off (follow him to the nugget bridge). Battle him and he will tell you the part is in the gym. Go back to the gym again and go to the north western most pile of inner tubes and search them (you will find the machine part). Go back to the power plant and give the part to the manager and you are finished.
Mewtwo is in the deepest part of cerulean cave
The stolen part in Pokémon SoulSilver was stashed away in the Cerulean Gym by one of the life rings.