Wii Fit Trainer (SSBU)/Down tilt
Wii Fit Trainer performs the bridge pose, striking low to the ground with her knees. This move has been historically understated in comparison to Wii Fit Trainer's other tilt attacks, but has steadily become a stronger tool over the course of Smash 4 and Ultimate. The most straightforward strength of the move is its heavy damage, dealing as much as 21.2% with the help of the 1v1 multiplier and Deep Breathing. In Update 8.0.0, down tilt was given kill power to match its ludicrous damage output thanks to a 15° launch angle change that consequently allows the move to kill almost as early as Wii Fit Trainer's forward tilt, one of her most potent kill moves. Aside from these two strengths, down tilt also has multiple niche uses and perks. Although the move has a disadvantage of 17 frames on shield, down tilt puts a large space between Wii Fit Trainer and her opponent such that many characters are not able to punish the attack thanks a combination of its heavy shield damage, pushback, and semi pseudo-crawl properties. This can sometimes even bait the opponent into whiffing a shield grab, in which case Wii Fit Trainer has a variety of punish options, such as a jab or even a raw forward smash. Although it does not hit every character, down tilt is also one of Wii Fit Trainer's few two-frame options, which can now lead to kills below 100% in Update 8.0.0. Finally, down tilt has the added bonus of being an effective low profile, increasing its general safety in a great deal of matchups. Overall, down tilt is a solid move that helps cover the area low to the ground (where many of Wii Fit Trainer's other attacks miss), and with its added kill power it doesn't have any real weaknesses aside from its slightly laggy nature.
The move disables jostling during frames 8-12.