This is probably a really niche character, but Yakon might have a chance.
In BT3, Yakon is part of a rush attack Babidi has, just like Pui Pui. In Sparking Zero they removed this attack and Yakon is nowhere to be seen. This might mean they could add him in the future, since it has a more defined fighting style than Pui Pui (by quite a lot) and it's more interesting. Mechanically it can have ki absorbing abilities like 19 and Gero since it eats ki blasts. Thoughts?