Falco (SSB4)/Down tilt
Falco performs a tail sweep across the ground. It has deceptively disjointed range, and has 3 hitboxes that get progressively weaker the farther the opponent is. It is a versatile tool, with the fast disjoint being able to combo into other moves, such as neutral, up or forward aerials, and can kill at reasonable percentages. As Falco has a relatively fast walk animation, down tilt is commonly used out of it as an approach. The damage is also good for a down tilt, dealing 9% at weakest and 12% at strongest, which further increases its usefulness. The main drawback however is that it only hits low, causing it to be beaten out by aerial approaches and the like.
Overall, a very good move for Falco, as it deals good damage, is fast and disjointed, can kill and also combo opponents into his good aerials.