Play Nice lowers the target's Attack stat by one stage and bypasses accuracy checks to always hit, unless the target is in the semi-invulnerable turn of a move such as Dig or Fly. It will hit the target even if it has used Protect, Detect, or Spiky Shield, but will fail if the target is protected by Crafty Shield.
If powered up by a Normalium Z into Z-Play Nice, the user's Defense stat rises by one stage.
Play Nice can be used as a part of a Contest Spectacular combination, causing certain moves (Circle Throw, Seismic Toss, Sky Drop, Smack Down, Storm Throw and Vital Throw) to give an extra three appeal points if any of them is used in the next turn.