Greetings, my Fellow Dandelions! As a rabid KH fan, I've had this question in the back of my mind and I finally have an outlet for it in this place! So, I gotta ask, do pure-blood Heartless Evolve?
As we all know, all heartless are in two separate categories; Emblem and Pure-blood. Emblem Heartless are made from machines, inanimate objects, ect. And Pure-blood are made strictly from darkness in our hearts.Thing is...ever notice how similar they look to each other? Let's take a look at Shadows for an example.
We have our cute little Shadow and then we have the Mega Shadow and then the Gigas Shadow. Of course, that's typical behavior. Shadow Spawns, doesn't get killed and gets more darkness and grows bigger, right? Then...we have NeoShadows.
These buggers look like a Shadow that's been hitting the gym, right? Taller, bigger and much more dangerous. Now, I could be wrong, but doesn't it just seem like a natural evolution to the Shadow line? It even has it in the name! My proposal is that when a heartless goes for a long period of time without dying, it grows in size, but if it actually fells a person in battle, it grows stronger and thus evolves. Like a Pokemon, for some of you fans out there. Another example, Posessors
They take control of inanimate objects and turns them into heartless themselves. Granted, when that object is hurt, it can't do much by itself...that is until it evolves. From here, I think that it could turn either a Darkball or a Shadow Stalker. And as we all saw from KH2, A Shadow Stalker definitely CAN evolve, into a Dark Thorn, and one could argue that this heartless evolves into a Dark Hide, if give enough time and experience.
My reasoning of why only Pureblood Heartless evolve is that they can't be mass manufactured. Emblem Heartless are made to be that specific heartless and nothing else. Any Heartless that is similar in shape, name, attack pattern, is due to small variations in their code. Only Pureblood heartless can form directly from darkness...and Darkness takes on many different and terrifying shapes if we let it. But hey, that's just a theory. A game theory! Until next time, Stay Shining!