If you loved Hunter × Hunter Pilot, try Yu Yu Hakusho: The Movie - The Golden Seal
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.
What they share
Both films are directed by Noriyuki Abe, and they both carry the foreign gem, playful mood tags, and they sit in Action / Adventure / Animation territory. If that's the register that drew you to Hunter × Hunter Pilot, the second film will land in a comparable space — through a different lens.
What Yu Yu Hakusho: The Movie - The Golden Seal is
Here's a film that takes a break from the usual Spirit Detective grind. Koenma is kidnapped while on vacation, and the culprits demand a powerful artifact. Yusuke and Kuwabara, also on vacation, must cut their holidays short to save the day. It's a nice change of scenery, literally and figuratively.

