a theory i have about vanitas is that when he was defeated by aqua,his darkness took root in sora's heart because ven and soras hearts were connected,and thats why he was still "searching for his light in kh1.Tell me what you think

You seem to forget that Ven destroying Vanitas had an impact as to which Vanitas' darkness wouldn't be in Sora. Just saying.

Ven has destroyed the dark part of him, this means none of Vanitas exists in Sora.

Ventus fall into his coma because Vanitas (Ventus Darkness) was destroyed.

Ventus fall into his coma because Vanitas (Ventus Darkness) was destroyed.

 

well if thats the case,then how do you explain sora "finding his light" in kh1 and anti Form in kh2,not to mention that in kh1 the darkness turned soras body into a heartless after he released,kairis heart,but he still had ventus' heart?

Ventus fall into his coma because Vanitas (Ventus Darkness) was destroyed.

 

and vanitas also looks like sora

and vanitas also looks like sora

 

Antiform has nothing to do with Vanitas. It looks more heartless orientated than unversed. Sora can probably use it due to the fact he became a heartless for a small amount of time. 'Finding his light' also has nothing to do with Vanitas, he is long gone for now.

well if thats the case,then how do you explain sora "finding his light" in kh1 and anti Form in kh2,not to mention that in kh1 the darkness turned soras body into a heartless after he released,kairis heart,but he still had ventus' heart?

 

I don't get your point here. Sora has darkness in his heart, just like everybody else except from the Princesses of Heart and Ventus after Vanitas was created.

 

Sora released his heart and it became a Heartless.

I don't remember Nomura's explanation about Anti-Form but, it is somehow connected to the time Sora turned into a heartless.

Vanitas has nothing to do with any of this.

 

 

and vanitas also looks like sora

 

When Ventus was about to die he connected his heart to a new born child named Sora. Sora and Ventus connection affected Vanitas appearance and made him look like Sora. If Ventus connected his heart to Riku, Vanitas would have looked like Riku instead.