PG13 is probably a stretch. Transexuality, plastic surgery, all that fun stuff in this parody. James and Lily wanted a girl, but instead they got Harry. What really happened? And does silicone really deflect curses?
PG13 for swearing, among other things. Post-Hogwarts humor. A scatterbrained Hermione, an attack on the Ministry, Harry as Minister, and an evil Cho are only part of the insanity.