Did you actually read Spockanort's post?Why would the Riku Replica have the same attitudes and goals as the other villains I mentioned. Please explain why it so obvious that the Riku Replica would want the same thing those other villains want?
I didn't even categorize the Riku Replica as a villain in KH:3D. I called him a former villain. Whether he will reprise his role as a villain in KH:3D has yet to be seen. If his contributions to the plot intentionally benefit the protagonists, then that's a simple reason why he wouldn't want to be found by villains that are trying to hinder the efforts of the protagonists.
The ideas I'm suggesting are no more unsubstantiated than the suggestion that Data Riku will magically get his memories back in KH:3D even though they were erased in Re:coded.
Ah Maleficent, I love you for giving more reason for Data Riku to appear <3