you surf on the water on route 9. (near the rock tunnel)
At the Power Plant.
It's in mistys gym
head East of Cerulean City then surf a little.
Zapdos is located outside of the Power Plant in Kanto.
he comes back to the power plant every day
a courgette is something which is grown in france with cow dung.
you have to have all 16 badges after that zapdos will be right outside the power plant
Power Plant
you meet a team rocket member who hides the rotor in a ring
When you return the machine part to the power plant.
It is on the left side of Saffron city you can go there after solving the power plant problem.
you have to look in places where a legendary might live (example: Zapdos=power plant)