At least it's not a Melee Peach Down Smash... Or Brawl and Smash 4 Fire Bird, Melee, Brawl, and Smash 4 Fire Fox, Melee Falco Fair, and Melee and Brawl Fox Fair and Dair. Those do at worst, 23% assuming all hits connect which is very possible for Fire Fox, Brawl Fox Fair, and Brawl Fox Dair.
Mega Man's Uair does... I hate reading rehit rates... I think it does 24% total. (3% x 3) + (2% x 4) + (1% x 5) + 2%. That assumes all the hits connect.