Piccolo splits a portion of his energy and creates a perfect duplicate of himself.
These guys will duplicate your movement and attacks as well as they can. They also can take quite a few hits.
-a LK Clone will stay behind you and copy your exact movements and attacks instantly. His Timer drains the slowest.
-a MK Clone will do the same, but do so with a slight delay. His Timer drains the fastest.
-a SK Clone will do so without delay, and in addition to that he will always try to teleport behind the enemy, so you attack from both sides. His Timer also drains pretty fast.
Compared to the prevous Clones (the AI clones), there is no call-back command for these. Since they will mirror your every move.
Instead, these Clones will act time-based. When their timer bar is empty, they'll run back to base Piccolo and merge back with him.
If you already have one Clone out and you want to create a second one, that's gonna cost you 2 Levels of the Power Bar instead of just 1.
Clones will never do the Mystic Harpoon (or its anti-air variant), instead they will always do the Strong punching version.
Also, Clones also can't do EX Specials but they will instead use the strongest variation available to them.
Lastly, when in Demon Mode, the Clones can indeed use the Trap Blast,
but after traveling to its destination it will explode when it would normally settle.