Alternate KQ6 Ending
This alternate ending begins after you get Beauty's clothes on the Isle of the Beast. This solution was given to me by Kevin Vogrin, and hence, I cannot answer any questions about it, so please do not contact me with questions about this alternate ending. I have never actually tried this out, so try it at your own risk. Good luck!
Go to the little building outside of the castle and put Beauty's clothes on. Alex will walk into the castle and discard his clothes into a pot after a cook goes by. Next, go left up the stairs and hide behind the building until the guards both have their backs turned on you. Quickly go up and hide behind the pillar. The up arrow should appear. When the guards are walking up the path put the mechanical nightengale out in the floor on the carpet. The guards should take it and leave. There should be a picture on the wall by the pillar. Take it off and take the nail from it. Then walk down the hallway to a door where the princess is in. Slip the dagger under the door and go back to the hallway and in one of the doors on the right.Open the safe with the nail, take the plans, and put the nail back on the picture, hide behind the post and go back to the area where you came in. Saladin should bring you in after you show him something. At the wedding, put the mirror of truth on the princess, which is really the Genie. Then, go up the stairs and finish the game as it says at the end of the walkthrough.