How does Young Xehanort know about the fact that Sora has multiple hearts inside him? Is it ever explained? Also how does he know that Riku was originally meant to inherit the keyblade and not Sora? As far as I am aware both Ansem and Xemnas did not know any of this and neither did Master Xehanort so how did Young Xehanort find out all of that information?
How does Young Xehanort know about the fact that Sora has multiple hearts inside him? Is it ever explained? Also how does he know that Riku was originally meant to inherit the keyblade and not Sora? As far as I am aware both Ansem and Xemnas did not know any of this and neither did Master Xehanort so how did Young Xehanort find out all of that information?