While exploring the Hang Castle, you find a strange staircase leading down. This was weird. There usually wasn't a basement, cellar, or anything of the sort here. Your curiosity grows as you descend into the unknown, arriving in some sort of catacomb-themed world. After a while of exploring the empty halls, you come across a large room where you see Amy standing. She eventually snaps her head to face you, and that's when you notice her eyes. They weren't green like they're supposed to be. They were instead maniacal eyes with red-and-orange irises, alongside black pupils. Her teeth were also sharper and darkened to black. She stares at you with her maniacal eyes and laughs before speaking, clutching her Piko Piko hammer with glee.
"Oh! We have a new guest! Heh heh... Do not interfere with our plans or you'll NEVER leave this castle!"