In Pokemon FireRed what legendary can you catch?

In Pokémon FireRed, you can catch Articuno, Zapdos, and Moltres - the legendary bird trio.

Here's how to catch them:

* Articuno: Found in the Seafoam Islands, on the top floor.

* Zapdos: Found in the Power Plant, on the top floor.

* Moltres: Found in Victory Road, on the top floor.

You can also catch Mewtwo in the Cerulean Cave, but only after beating the Elite Four and becoming the Champion.