Playing as Riku Current Summary...

Well, I've been trying this and that to play as Riku and nothing wants to work. The digits for normal Riku are 0819. Another Riku mod is the "Final Battle" Riku which is: 08D1 and a "In-Pain" Sora 08D2 when combined, do nothing. A final Xemnas (081F) can be added to the party, but he appears to only create battle music and nothing more (Or he is invisible.) I tried having Sora & Xemnas in the party and something was triggered during battle. Also, when having the Boss Riku in the party all enemies seem to ignore Sora and aim for that Riku.