The Destati Voice

[Zero Sora]

As shown in BbS the voice in Ven's Destati belongs to Sora, cause at the end it actually shows Sora talking to Ven and Ven asking to connect his heart to Sora's once more.

For Sora it was King Mickey. As proven in the KHFM Ultimania.

 

[sora4sky]

What the others said: KH1 voice king mickey and BBS voice Sora's....

 

[Caasix]

It has been confirmed that the voice in KH1 is Mickey. Im sure BBS Ultimania will confirm the other voice to be Sora. But I personally prefer to think that it's the voice of the keyblade in the Destati.

 

[loke13]

It was already confirmed in the KHFM Ultimania that the voice in Sora's Destati belongs to Mickey.

As for the voice heard in Ven's Destati, it's heavily implied in the dialogue that it's Sora's heart.

IGNORE^

Nomura retconed that its Vens voice in his Destai. And Sora. in Vens Destai.