Here's how you can find it in the games:
* Learn it through a Move Tutor: Some Pokémon can learn Metronome through a Move Tutor, which is a character that teaches Pokémon new moves for a fee. The location and availability of Move Tutors vary depending on the game.
* Find it on a TM: In some games, Metronome may be found on a Technical Machine (TM), which is a reusable item that teaches a Pokémon a specific move.
* Breed it: Some Pokémon can pass down Metronome to their offspring. You can check the breeding information for specific Pokémon in the game's Pokédex.
If you're having trouble finding Metronome in a specific Pokémon game, I recommend checking the game's wiki or a Pokémon strategy guide online.