Wario (SSB4)/Neutral attack/Hit 1
Wario performs a downwards punch. It does 4%, but is tied with Palutena for the fourth slowest jab in the game. The deceptively small hitbox of the move and the knockback growth that prevents it from linking it into Jab 2 at even mid percents greatly hinders the attack. At higher percents, it can put the opponent into tumble, and lead into tech chases or combo into forward air, however this is very situational, and down tilt is capable of doing most of this as well. If the button is held, it will transition into jab 2, and if the button is tapped rapidly, it will transition into jab 2 much quicker. At early percents, it can provide niche use in having more reward than down tilt, as down tilt cannot combo into anything at early percents, whilst jab 1 leads into jab 2 correctly at lower percents.
Wario's jab is a relatively poor move overall, and his grab or down tilt make for much better options, due to their utility being far greater than jab.