Birth by Sleep Who is Xehanort's apprentice?

Exactly.
But there were still nobodies.
Unless that when a Pureblood heartless is born they don't make any nobody.

 

Eh. True. But the fact is there was barely any Nobodies to start off with.

 

Right.
But i wonder if at least a single one of those was strong enough to keep his human form.
Hm.....

 

This is actually quite unlikely, seeing as there weren't many purebloods to start off with.

Only a few are, which means they would probably be Dusks anyway. This should also be taken into consideration.

 

Try to stick to the topic. Thats good info but who is the apprenice of Master Xehanort.

 

When I first watched the cut scene, I thought that he was just like the Guardian heartless that protects Ansem. So it may just be that Master Xehanort created a being that would protect him and help fight with him. Then Ansem used that knowledge to make the guardian.