I don’t get the animosity towards AR ghosts. Because they’re ghosts it would actually be far more convincing and fitting than the drivers in Mario Kart. I haven’t put this part out my idea out yet but it also includes highly interactive physical props throughout the mansion (vases, drawers, various knick knacks, etc.) that perhaps could drop treasure that would likely also be AR.
Cue the “BE GONE SATAN!!!!!” comments.