Sora arrives in Castle Oblivion and starts climbing his way up. Halfway into his journey, he runs into who he thinks is Riku. In his excitement, he runs over and kisses him.
Half of all the problems that would have happened are avoided because this causes Repliku, who thinks he is Riku, to short-circuit. Literally, in his case. Sora’s a panicked mess until the real Riku catches up to them.













