Pokémon Go's Frustration move can only be removed or forgotten at certain times.
The Pokémon Go move is used by shadow Pokémon upon being caught by default, and can only be removed during Team Go Rocket-specific 'Taken Over' events with the use of a Charged TM.
This guide explains when you can next remove Frustration in Pokémon Go, and how to remove Frustration when the window arises.
Update (1st June): With the next 'Taken Over' scheduled, this page has been updated.
When can you next forget Frustration in Pokémon Go?
Frustration can be removed when a Team Go Rocket 'Taken Over' event is active in the game.
The next 'Taken Over' event takes place between Thursday, 25th June and Monday, 29th June, as part of the 'Flying Taxi: Taken Over' event.
After that, the next opportunity won't be until September at the earliest, as there is usually one 'Taken Over' event per season. It's worth noting, however, that in very rare circumstances Frustration can be removed at other times, so it's possible it might happen sooner. (For example, it was allowed during November's Go Wild Area 2025.)
How to remove Frustration in Pokémon Go
To remove Frustration from a shadow Pokémon, go to the Pokémon's status screen, select Items from the corner menu, then select either a Charged TM or Elite Charged TM.

If you're outside of a 'Taken Over' event, the item will be greyed out, and a message saying the Pokémon "cannot forget Frustration" will be displayed.
If you are playing during a 'Taken Over' event and Frustration cannot be removed, try closing and reopening the game (which is a useful rule of thumb for when anything doesn't work as it should, such as getting the Daily Adventure Incense to show in-game when you haven't used it yet).
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