it's found in the Cerulean Gym where you face Misty. (found in a pile of inner-tubes after facing a couple of rocket grunts on the left side of the gym.)
One rocket grunt will be found in the cerulean gym, and another on the bridge leading to the Cerulean cape.
You must beat both of them to recover the lost power plant part though.
First you must go to the power plant and find out that the missing part is gone. You will then be prompted that a suspicious character is in Cerulean City. Go to Cerulean City and enter the gym. You'll bump into a Team Rocket grunt. Then go north up the bridge and see the Grunt. Battle him, and he'll tell you that he hid the missing part in the Gym. Go into the gym and search in the water for the part.
The stolen part for the Generator can be found in the tubes in the Cerulean Gym, the tubes that it's hidden within is would be the ones that are on the left side of the swimming pool but at the very top.
you get it at the cerulean city gym next 2 the pool hope this helps
his # is 1 of the hardest to get...first, you have to catch zapdos which should be in front of the powerplant in kanto. then, catch a pikachu from soulsilver's viridian forest. a pikachu from any other game wont work. then, make pikachu the first Pokemon in ur party. go back to the powerplant any day between 9 and 11am and he should be standing in the grass. talk to him and he will give u his #.
He is in soulsilver after you get all 16 gym badges go to the powerplant in Kanto and there you will see him. He is at level 50 so get his HP as low as possible. Put him to sleep the get out your strongest Pokemon and use a level ball (Made by Kurt). If you don't have a level ball the use a lot of ultra balls. After 20 turns if you haven't caught Zapdos then use a timer ball because it will be twice as strong as a Ultra ball.
you go to the the powerplant east of cerreleun city
SOulsilver
A Pokemon from a Diamond, Pearl, Platinum, Heartgold, or Soulsilver event.
you get it in the powerplant in Pokemon firered/leafgreen but in soulsilver/heartgold you get it in the grass out side of the powerplant
the powerplant
go to the powerplant and he is outside.good luck
Zapados is located for capture at the Kanto Powerplant.
rock tunle surf down and there
beat all voltorbs ( or they are electrodes, whatever)
From the Lavender Town Radio Tower, after you have fixed the Powerplant Generator
what are the parts and functions of geothermal powerplants
Return the missing part to the Powerplant He will then let you in
The stolen part in Pokémon SoulSilver was stashed away in the Cerulean Gym by one of the life rings.
outside the powerplant after you beat the machine parts
you go to cerulean city and head east until you come to a strip of water then surf down to the powerplant and on the left side of the building is Zapdos.