Originally Posted by aubman02
So your thinking that perhaps Ulquorria and all the numbers down to one weren't made by Aizen? I can see that.
Thanks for clearing things up!
All Arrancar were made by Aizen it seems, but what I am saying is that only those as powerful as Uliquorra and above were Vasto Lordes prior to become Arrancars. I am hypothesizing based on my own inner-hunch, but it would make sense.
Remember Vasto Lordes are the ultimate Hollows, while an Arrancar (Espada included!) are Hollows who gained Shinigami powers through shinigamification. Being an Arrancar does not mean they are more powerful than Vasto Lordes, only some of the Espada are more powerful than them as Hitsugaya said: "they [the Vasto Lordes] have the powers of an average captain."