Remember that plot point about the Heartless obeying the most powerful person in the area? Honestly, seems to me that they're more likely to obey the token villain of the area. After all, Peter Pan is more powerful than Captain Hook, shouldn't the Heartless obey him? Why can't Riku control Heartless?
I can understand Sora not being able to, he has a keyblade and all, but everybody else is still pretty powerful...
Remember that plot point about the Heartless obeying the most powerful person in the area? Honestly, seems to me that they're more likely to obey the token villain of the area. After all, Peter Pan is more powerful than Captain Hook, shouldn't the Heartless obey him? Why can't Riku control Heartless?
I can understand Sora not being able to, he has a keyblade and all, but everybody else is still pretty powerful...