The original model can be a bit finicky with being made of separate parts for the base. This one is half-sized and the base is made of one piece for the top/bottom and is much more stable.

To print the ghosts check your slicer page and set a pause where the color changes from the face of the ghost to the blue scared face. Then change the white filament to yellow. The print won't need white again and this lets you print a 5-color item with just a 4-spool AMS. To change to the other ghosts, just change the filament spool from red to the other ghost colors (pink, orange, light blue). No need to change it in the model or slice it again.