Mii Brawler (SSBU)/Forward aerial
Mii Brawler attacks with their feet, with one hit designed to lead into the other. Forward aerial is most frequently seen in Mii Brawler's combos, usually out of down tilt or down throw. While the move has weak knockback, its two hitboxes make it a reliable move for pushing opponents into the blastzone in edgeguarding scenarios.
Additionally, forward aerial is notorious for failing to connect its first hit into the second hit when the move is performed during certain parts of their jump.