Holy crap you are being so annoying.
But you know what, the Arena may answer this question because it seems that all of those creatures are Mystic like creatures, right? Perhaps it's like a Pokemon-like evolution.
So you're saying they evolve into a form that can take on the form of other forms? >_> I don't know how much canon the Arena plays...and it seems kind of out-of-dimensional...
Look, Becklar doesn't even matter. It is quite possible he is from the Antiquity and you can disagree with it all you want. I don't care and it is irrelevant on this thread! Sprigg is a mystic and she is the closest we can to understanding them because she joined our party, I want to know where the hell(which may be the origin considering they are demons) they come from and why is it they only start appearing in the antiquity in the Lavos Dimension, and how they could possibly exist in the Lost Sanctum. Plus it seems that the Mystics are much stronger than the Dragonians/dinos (depending on the evolution time) and the humans. Finally I was just trying to find a way of explaining how they could have different forms and abilities using the Arena as another source, considering how few there are. If you're not going to do anything but disagree with me without saying anything else such as why I
MUST be wrong (which you haven't, because you're saying all I'm doing is speculating), then don't post. And there is nothing wrong with speculation, many great theories came out of speculation, much like the existence of anti-particles was nothing but speculation for a long time but was eventually proved true. If you keep saying no you're wrong without giving me any reason then you're not being helpful. No I know I'm going on a rant, but you didn't say anything but "you're wrong because you don't have concrete evidence."
About the Arena, what I meant was what if your monster is actually a mystic, and mystics evolve, or class change, much like Pokemon. do you understand. Flea is a high class Mystic and being that class she has the ability to transform.