I've not completed all the secret portals and received the keyblade Unbound with Riku after defeating Holey Moley in his secret portal.

 

That would be a bug?? because I read:'' Given to you after clearing all Portals Secret'' in Keyblade Guide

 

Excuse my English, I'm from Brazil.

you probably did all the secret portals for Riku, but not for Sora

I dont finish all secret potals with Riku and Sora.

 

I think it's the same bug.

random fact: there's no secret portal in Symphony of Sorcery with Riku

I understand now, I have overcome all that has portals secret boss with riku, so I won the keyblade.

In Symphony of Sorcery no boss to riku.

 

So it was not a bug.

When I win Symphony of Sorcery with Sora I also win the keyblade.

 

Thank you all for helping me.