|The user pins the target with a dark, arresting look. The target becomes unable to flee.|
Mean Look prevents the target from switching out or fleeing (including via Teleport). It bypasses accuracy checks to always hit, unless the target is in the semi-invulnerable turn of a move such as Dig or Fly. The effect only applies as long as the Pokémon that used it remains in battle.
It will hit the target even if it has used Protect or Detect.
The affected Pokémon can still switch out via Baton Pass, but in that case, the Pokémon that switches in will now be affected. Conversely, the Pokémon that used Mean Look can switch out with Baton Pass and the effects of Mean Look will still apply. Also, if the affected Pokémon is Roared at or hit with a Whirlwind, they will still be switched out.
If a wild Pokémon uses Mean Look on the player's Pokémon, the player will be unable to escape.