I'm at the part in Chapter 8 where there is a hall of mirrors in Bleck's mansion and Dimentio is there. I left and went to the fortune teller, who told me to find the mirror that's odd because it's not a mirror and flip it. So I went back and used Fleep to flip every mirror without a reflection and nothing happened. I even flipped with Mario on each place where you can stand and nothing happened. Someone please help me!