If you're talking about the Pokemon video games, the method for a Pokemon to learn a move depends on the specific game:
In most Pokemon games, you can teach a Pokemon a forgotten move using a Move Reminder:
* Find a Move Reminder: These are typically found in specific locations like Pokemon Centers or shops.
* Use a Move Reminder: Interact with the Move Reminder and choose the Pokemon you want to teach a forgotten move. You can then select the move you want them to learn from their list of previously learned moves.
In some games, like Pokemon Sword and Shield, you can use a Move Relearner:
* Visit the Move Relearner: You'll find them in certain towns or cities.
* Choose your Pokemon: Select the Pokemon you want to teach a forgotten move.
* Choose the move: You can then select the move you want them to learn.
Remember: There might be limitations on which moves a Pokemon can learn depending on its species, level, and the game's mechanics.
Let me know which game you're playing if you need more specific instructions!