Hotel Transylvania 4- Lost Love

Dennis was about as happy as it gets- he had the hotel, Drac, Mavis, Johnny, Tinkles, and recently got a grandmother, Erica.
But Dennis has a separate spot in his heart for his best friend- eight at the time that he was six- Winnie, of course. They go on adventures, play games, and just have fun together. But a week after Dracula and Erica's wedding, Winnie announces that her family is moving away to a wolf community, and that was why she was trying to get Dennis to zing.
Years pass and Winnie still hasn't returned, that is, until he hears a knock on his bedroom door.