I was rewatching the Days scenes in preparation for 2.5 tomorrow and I wondered some things that I surprisingly never asked about before. When Roxas runs up Memory's Skyscraper he throws the Oblivion keyblade to Riku and they begin to fight each other. Why does Roxas do this? Why would he give Riku a weapon? You could say he wanted it to be a fair fight but that leads me to another question. Why didn't Riku use the Soul Eater?