If you loved Hotel Transylvania: Transformania, try Monster Pets: A Hotel Transylvania Short
A bridge between a film you've already seen and one most people haven't. Monster Pets: A Hotel Transylvania Short has roughly 7.4× fewer votes than Hotel Transylvania: Transformania — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.

Hotel Transylvania: Transformania

Monster Pets: A Hotel Transylvania Short
What they share
Both films are directed by Derek Drymon, Jennifer Kluska, and they both carry the cozy, playful mood tags, and they sit in Animation / Comedy / Fantasy territory. If that's the register that drew you to Hotel Transylvania: Transformania, the second film will land in a comparable space — through a different lens.
What Monster Pets: A Hotel Transylvania Short is
Here's a film that asks, what if Dracula had a puppy? The short follows Drac as he attempts to wrangle a series of increasingly chaotic monster pets for his giant dog Tinkles. It's probably canon.