The first, Zac, is a shota character from an obscure arcade game called Pu Li Ru La. I have no idea if this was something he could do in game(I doubt it), but in this Mugen version he can eat his enemies if you get up close to them press Y+Z.
Spoiler: show
The next is Gengar, from Pokemon. The edit is made by ZackTheRiolu Not much to say about this one, example images on the linked page, the file is on patreon but it's not locked behind a paywall, there is however updates(that are not finished yet) are coming with a certain monetary goal.
http://www.furaffinity.net/view/24691653/