When activated, the Brawler jumps up and swings their fists in a downward hammer punch. It is rather slow but does 13% damage, more than the Brawler's other side specials (if Burning Dropkick is counted as being uncharged). It can also be used as a very risky meteor smash and short range recovery move. The move behaves much like Little Mac's Grounding Blow, a custom of the Jolt Haymaker that rises and falls, causing a meteor smash. When this move is used high enough in mid-air, the move will do less damage or put the Mii Brawler in helplessness, therefore not doing any damage upon landing.
Special Move customization was added in Super Smash Bros. 4. These are the variations:
When playing on PictoChat 2, standing on the diagonal areas on either sides of the stage while using the move causes the Mii Brawler to jump twice its normal height, with the attack only dealing 3% damage. This also works with Little Mac's Side Special. It also appears to work on other stages with similar slopes.