One-hit KO

Overview
A one-hit ko(ohko} is a ko in one hit.

Possible OHKOs
A homerun bat is a common way to score a ohko. Another way is to use Donkey Kong to pick them up, jump off the stage, and throw them when DK is at the bottom of the screen. The last way (that is known) is to use Kirby, swallow them (B) and jump off the stage.