During annual Reunion Day, the Monster High ghouls, Grimwood girls, and kids of Hotel Transylvania get a surprise visit from two kids, one who's supposed to be dead and one who has been missing for many centuries. So how will the ghouls react to seeing the two elder teens? AU. Shaggy, Scappy, and Scooby returned to teach the next year at Grimwood's. While Mavis is pregnant.