If you loved Doraemon: Nobita and the Castle of the Undersea Devil, try Doraemon: The Record of Nobita's Parallel Journey to the West
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.

Doraemon: Nobita and the Castle of the Undersea Devil

Doraemon: The Record of Nobita's Parallel Journey to the West
What they share
Both films are directed by Tsutomu Shibayama, and they both carry the cozy, playful mood tags, and they sit in Adventure / Animation / Family / Fantasy / Science Fiction territory. If that's the register that drew you to Doraemon: Nobita and the Castle of the Undersea Devil, the second film will land in a comparable space — through a different lens.
What Doraemon: The Record of Nobita's Parallel Journey to the West is
Even a time-traveling robot can’t resist a school play. The gang auditions for Journey to the West, then accidentally swaps eras with the story’s demons. Nobita gets cast as Son Goku and must now perform the legend for real or the world stays overrun.