How do you get 3 legendary birds on Pokemon Yellow?

Moltres: Victory Road. Articuno: Seafoam Islands. Zapdos: Power Plant Also, a common misconception with the Legendary Birds is that you can't catch them if they aren't Asleep, because the Poké/Great/Ultra Balls you throw always miss otherwise. Well, if they miss, it just means that they would have broken out of the ball if it had hit. However, if the ball does hit them, then it will always capture. For example, you're trying to catch Zapdos, and you throw an Ultra Ball. It's Paralysed, and has just a slither of health left. It misses, and it attacks you. It missed, because the game knew that the ball you just used would not have caught the Pokémon, and Zapdos would have broken out of it if you had hit it. Next turn, however, you throw a second Ultra Ball, and this time it hits. Because it only hits when the game knows that it will catch it, then that Ultra Ball you just threw caught the Zapdos. Hope that clears it up.