THat would be a No. You cannot make your own keyblade in KH2. The designs are too diverse and complicated, unless they just made it so you can upgrade them...which would not be creating your own anyway. To create your own would be immensly difficult. Are you aware how long it would take the game designers to write the code and make the model file for a single keyblade...and that's with professional software, on a computer. You cannot make your own keyblade in KH2. Question answered.