Comic coming soon!
(More info on cackle!)
Cackle is a "pony" that some how appeared in the human world unbeknownst to them and their captors, as they call them.
Cackle is a demon with a pony like appearance that one day showed up and manehattan. They don't have a gender as far as anyone can see, Thus the pronouns used are they.
They DO however have a cutie mark strangely enough it is a tentacle, Their jaw can dislocate and open to surprising lengths, it's tentacles are contained in it's mouth, neck mouth and stomach, It seems as though the inside of this pony is an abyss it has been perceived that the cutie marked was earned through not only consumption but the sinking of various boats in the Hoofson bay, as many had dissapeared around the time cackle appeared. Cackle is not evil but neutral. They will not hesitate to eat anything but will upon request of friends refrain from doing so. Cackle has a obedient disposition and does enjoy creating chaos but when commanded like a dog will stop seemingly confused and taken aback. Some say that this "pony" was brought about by a summoning ritual that was meant to awake an eldergod.
Their flesh is not fuzzy but has a sort of tough rubber feel like a dolphin, Their mane and tail are always disheveled as they love to swim and roll in any kind of liquid, as if to keep their flesh from drying up. There is only one thing this pony is afraid of and that is hay; it is too dry and steals moisture, it is seen by cackle as strange and unnatural for such an aquatic loving pony. Fortunately for the rest of equestria there is a lot of it to go around.
Poison Joak effect: Will shrivel up from lack of moisture, skin will wrinkle and become pruny, hair will flop down stringy and dry.