Wii Fit Trainer (SSBU)/Down aerial
Wii Fit Trainer performs the Chair pose, squatting and then striking downwards with both legs. This move has many strengths, the biggest of which being its huge spike hitbox covering Wii Fit Trainer's entire bottom half. Notably, it is the only stomp-type down aerial in the game without any sort of sourspot on the clean hit, making the move extremely easy to position when edgeguarding an opponent. The spike itself is decently strong, capable of straight up killing almost all characters offstage by early-mid percents, and even earlier with Deep Breathing. The move cannot spike grounded opponents, but the clean grounded hit is also quite strong, capable of killing most character by roughly 110% with Deep Breathing. Surprisingly, even the late hit of the attack can kill at around the same percent as the grounded hit, and quite early if it connects with an offstage opponent. Considering its strength and size, down aerial is also relatively lagless, autocanceling from a short hop and only being -7 on shield. This makes the move somewhat spammable, especially when edgeguarding. Due to the move's sizable hitboxes, down aerial can also be used somewhat effectively as an aggressive landing option, something Wii Fit Trainer sorely lacks otherwise. Overall, down aerial excels in virtually every area and has no real weaknesses to speak of, causing it to often be regarded as one of Wii Fit Trainer's most flawless and dependable moves within her playerbase.