King K. Rool (SSBU)/Neutral attack/Hit 3
King K. Rool does a strong kick, dealing some hefty damage. In fact, it's the highest damage of any neutral attack Hit 3 in the game. As a result, this attack is often used for damage. Neutral attack Hit 3 is programmed specifically to not have true followups while being safe on hit: +1 at 0 (tested on Mario), eventually becoming +13 at 150%. With 4 active frames, it is also long lasting and will catch opponents just rushing in.
This is usually used out of down throw at mid%s to lead to ledgetrap situations while fixing staling, or set up for Crownerang. The latter, while not a true combo by any means, sets up for a strong advantage state. The move does set up tech situations prior to mid%s as well, which makes Crownerang and Blunderbuss Kannonballs fair options to cover everything except roll in, which can be beaten with neutral attack Hit 1 as well if the opponent lacks good reaction time. This becomes a small vortex situation of sorts.
However, Hit 3 does have small drawbacks. The foot is actually a large hurtbox extension while not having the hitbox cover the whole thing (although horizontally it is disjointed). It is also a bit laggy, meaning it is far less safe to do in neutral unlike Hits 1 and 2. It also doesn't tend to send into tumble at 0% even with Hits 1-2, making use at this percentage questionable. However, Rage mitigates this issue quite easily. Furthermore, it should be noted that King K. Rool's neutral attack is somewhat inconsistent at actually connecting, in part due to Hit 3's hitbox not being fully quite large enough to hit.