Sing is Jigglypuff's Up B attack. Soundwaves and music notes come out from her body and travel out a certain distance. All opponents within range (and touching the ground) will fall asleep for a short amount of time. This attack does no damage at all and simply disables opponents to set up for attacks.
Unlike most Up B moves, this is not a third jump. Jigglypuff enters a helpless state and gains no height. Instead, players often use Rollout or an air dodge as a third jump. Timing of this move is crucial, as opponents who fall asleep at the beginning can wake up before Jigglypuff finishes singing. This leaves Jigglypuff vulnerable to counter-attacks.
Trivia
- Switching the language to Japanese changes Jigglypuff's name to Purin. Her Sing attack song is now "Pu-purin".
- Although it does no damage, Sing can destroy targets in Super Smash Bros. Melee's Target Test.
- In Event 39: Jigglypuff Live!, there is an easter egg involving the Sing attack.