Ok. Rosalina's banishment happened when she was just a girl, much like Terralina's coronation as princess. She was playing with Terralina one afternoon when they stumbled across the Forbidden Sanctuary of Dark Matter (Bowser went here during Super Mario Galaxy to develop Dark Matter Landscaping). No one was allowed to enter. Terralina, as persuasive as she is, convinced Rosalind to join her in...