i dont know how we are going to explain this but heres a theory. you know how in the KH2 secret movie theres like A THOUSAND keyblades in the crossroads? weird huh. so im guessing all the dual weilding crap comes from the keychain. i beileve that whenever sora holds a keychain up to his heart, the keyblade appears! it just doesenmt show that when sora switches keyblades in the game becuase they probably couldent get it to do that, or didnt have the idea. but that still doesent explain where they came from. mickey got his from the realm of darkness, sora got his from destiny islands, and riku got his from, well.......i think riku got his keyblade,souleater,from malificent,but where did he get way to the dawn? maybe he found it while he was taking the road to dawn,or how DiZ say it,"The Twilit Road To Nightfall" from KHCOM. aqua and terras keyblades have no chains, so, that doesent mean they are keyblades. but in KH2FM+ when terra hits you with his "Weapon" stars come off it like a normal keyblade would. its so hard to find out the mystery of these weapons. we should just get tetsuyas email from some japanese hobo whos obsessed with him. then we can ask tetsuya the question.