What Happens If You Use a One-Time TM on the Wrong Pokemon in Pokemon FireRed?

If you use a TM on the wrong Pokemon in Pokemon FireRed, the TM is permanently consumed.

The move is taught to the selected Pokemon, and the TM disappears from the inventory.

Because every TM in the game is single-use, the same TM cannot be used again unless another copy exists.

The same rule applies in Pokemon LeafGreen.

Why This Moment Feels Uncertain#

TMs allow a move to be taught instantly to a Pokemon.

Because the move can be learned by multiple Pokemon in the party, players may wonder:

The game does not clearly explain that TMs are consumed after use.

In Pokemon FireRed:

All TMs are single-use items, meaning they disappear after being used once in Pokemon FireRed.
Using the TM teaches the move immediately
The TM disappears after use

Once the TM is used, it cannot be reused on another Pokemon unless another copy of that TM exists.

Several important moves in FireRed are obtained only once, including:

Each of these TMs disappears after it is used.

Using a TM on the wrong Pokemon does not:

However, the TM itself is consumed and cannot be reused.

If you use a TM on the wrong Pokemon in Pokemon FireRed, the TM disappears and the move cannot be taught again unless another copy exists.