Hotel Transylvania: Transformania (PG), on Amazon
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Caution: spoilers.

This is the fourth (and apparently final) movie in the Hotel Transylvania franchise, following Hotel Transylvania 3: Summer Vacation. It was originally intended to have a theatrical release, like the first three films, but due to Covid-19, it was instead released via Amazon Prime Video. There were a few changes in the voice cast, most notably Brian Hull replacing Adam Sandler as Dracula. I liked it the least of any movie in the franchise, but it was still sort of okay.

On the 125th anniversary of the hotel, Dracula is planning to retire and leave the hotel to Mavis and Johnny. But when he imagines all the changes Johnny might make, he decides he'd rather not. Unfortunately, Mavis had already overheard him talking with Ericka about the plan, and she'd told Johnny. So now Drac has to make up an excuse not to leave them the hotel, and says there's a real estate rule against monsters giving property to humans, or something. Johnny then gets help from Van Helsing, who has a ray that can turn humans into monsters and vice versa. He uses it to change Johnny, so that he could inherit the hotel after all. But Drac tries to change him back before Mavis can see him, and accidentally turns himself into a human. Of course Drac wants to change himself back into a vampire, but the crystal that powers the ray has broken, so he and Johnny travel to South America to search for a new crystal. Later his friends Frank, Wayne, Griffin, and Murray also get turned into humans. (Blobby becomes a gelatin mold.) Eventually Mavis learns the truth, and she chases after her father and Johnny, along with Ericka and Drac's friends. In the end, everyone gets turned back to normal and Drac decides to leave the hotel to Mavis and Johnny, after all.

Well, I've left out some details, but that's the gist of it. And I don't know what else to say.