Up smash, abbreviated "usmash," is a smash attack performed by any character by tapping the control stick upward and pressing A, or (in versus mode) by pressing up on the C-stick. On Melee, the up smash can be charged by holding the A button for up to two seconds, resulting in higher damage and knockback.

Notable up smashes include:

  • Fox's up smash is the most powerful upthrowing attack wich most knockback due to fox being a great character for throwing characters skywards.