Mystic Mansion is the twelfth stage that Team Sonic completes in story mode.
Main Mission
Goal
Escape the haunted castle!
Guide
While being inside the castle, take out the enemies near by the switch target and the other one that keeps the door closed. Break it with Knuckles and the other one at the other side of the ghost upstairs too. Open the closed case with the switch covered with boxes (which need to be broken in-order to activate that switch). Be sure to avoid the pumpkin ghosts while doing this. Once open, teleport to the room where the door is connected with walls and destroy the robots on the other side.
Switch to Fly Formation and fly on top of the floating weight crusher and touch the checkpoint before touching the switch to open the door and just simply head to the teleporter beyond the lasers where it takes you to an open picture frame with the Egg Hammer in it. Defeat all 3 of these enemies with Power Transformation and head down the pit by either using the pole or going down alone. Climb up the steps and there's a bobsled leading through the digger tunnel. When you see a laser and some ghosts in the way, jump above them until you reach the digger tunnel. The less time you make it, the more chance a bonus may occur such as getting a power up for specific transformation used before riding it. Another bobsled is in the cave as well. This time you don't necessarily need to jump to avoid these obstacles when going that fast.