the true keyblade master is the one that HAS the keyblade in the first game XD
Riku had a shot but he had it taken away thus meaning he wasnet the true keyblade master, if he was then he would have the keyblade
plus he had it ripped away by sora in hollow bastion if u remeber, if riku really was the true keyblade master, he could haved kept it away from sora
so =P to the riku belivers, sora is da one and true keyblade master!!