Bowser Jr. (SSB4)/Dash attack
From SmashWiki, the Super Smash Bros. wiki
Bowser Jr. lunges forward as a circular saw spins out of the Junior Clown Car's mouth. The attack hits 6 times: 1.5% up to five times and 4% once, for a total of 11% if all of the hits connect. The attack launches the opponent diagonally upwards.