From Bulbapedia, the community-driven Pokémon encyclopedia.
This is a list of glitches that occur in the Generation VIII core series Pokémon games.
Sword and Shield
Sucker Punch glitch
In a Double Battle where the player who didn't initiate the challenge is down to their final Pokémon, that Pokémon's Sucker Punch will fail when used against the opponent on their right, regardless of what move that Pokémon selected for the turn.