Zapdos is one of my very first legendary pokemon. I can obtain him with just few badges and this pokemon is awesome that time. Zapdos is an electric type pokemon and you can catch it in powerplant factory. It is believed it's concept was based to an native American bird legend which is known as thunder bird.
What is your very first legendary pokemon? I caught zapdos using pokeball and it take me tons of pokeball just to catch zapdos. How about you?