Can You Catch All Legendary Dogs in Pokemon FireRed?

No. You cannot catch all three legendary dogs in a single Pokemon FireRed playthrough.

Only one roaming legendary beast appears in the game.

The specific Pokémon depends on the starter you chose at the beginning of the game.

The same rule applies in Pokemon LeafGreen.

Why This Moment Feels Uncertain#

Raikou, Entei, and Suicune are often associated as a trio in the Pokémon series.

Because they are grouped together in other games, some players expect all three to appear in the same playthrough.

However, the roaming legendary system in Pokemon FireRed works differently and is part of several one-time encounters and exclusive outcomes in Pokemon FireRed.

The game does not clearly explain that only one of these Pokémon will appear.

In Pokemon FireRed:

Once the roaming Pokémon appears, no additional legendary dogs will spawn during that playthrough.

Because of this system, it is not possible to encounter all three in a single save file.

You cannot catch all three legendary dogs in Pokemon FireRed.

Only one roaming legendary beast appears in each playthrough, determined by the starter Pokémon.