Though it is not very important, after CoM when Mickey and Riku left Castle Oblivion and went on some sort of escapade for a while before going separate ways, and then afterwards Mickey crossed paths with Riku again when he thought Riku was Ansem SoD, and finally Mickey was seen at the beginning of Kingdom Hearts II, what was Mickey doing during the time he was not seen? I am also not entirely clear on how and why Riku went back to Ansem the Wise apart from the fact that he was told that catching Roxas would make Sora wake up.