Can You Get Both Hitmonlee and Hitmonchan in Pokemon FireRed?

No. In Pokemon FireRed, you can only choose one of the two Fighting Pokemon at the Saffron City Fighting Dojo. The other becomes permanently unavailable in that playthrough.

After defeating the Karate Master, you are allowed to pick either Hitmonlee or Hitmonchan. Once one is taken, the other cannot be obtained in the same save file.

The same rule applies in Pokemon LeafGreen.

Why This Choice Feels Risky#

The Fighting Dojo presents both Pokémon side by side as Poké Balls on the floor. This moment is part of several irreversible choices and one-time decisions in Pokemon FireRed where choosing one reward permanently removes the other.

There is no detailed explanation of long-term consequences.
The game does not explicitly say the other Pokemon will be lost.
Both appear available at the same time.

For players trying to avoid permanent loss, this moment can create hesitation.

What Actually Happens#

After you defeat the Karate Master:

You may choose either Hitmonlee or Hitmonchan.
The unchosen Pokemon cannot be claimed afterward.
Interacting with the remaining Poké Ball triggers a message preventing you from taking it.

Leaving the Dojo and returning does not reset the choice. The second Pokemon remains unavailable for that playthrough.

There is no in-game method to obtain both within a single save file.

Another comparable choice appears earlier in the game when selecting a starter Pokemon and choosing between the Helix Fossil and the Dome Fossil.

In Short#

You must choose between Hitmonlee and Hitmonchan.

The decision is permanent for that playthrough.

It does not affect story completion, but you cannot obtain both in a single save file.