In this movie, Doraemon helps Nobita create an alternate reality where rabbits live on the moon. If one were to boil this movie down to its individual core elements, I think they'd find very little that hasn't been done in previous Doraemon films. (Okay, having one of the movie-only characters pose as a transfer student and actually interact with Nobita's classmates outside of the main cast is new.) However, that actually works to its benefit, in my opinion. After so many of the post-reboot Doraemon movies have felt experimental in one way or another (with varying degrees of success in my book), it was nice to see one that replicates the vibe of a classic Doraemon story without being a straight-up remake of an older film.
I also thought this movie does a good job of introducing potentially convoluted plot points without feeling bogged down, especially the main gadget that allows the story to happen: the Fringe Theory Club Member Badge, which can create alternate realities that are only perceptible to people wearing it. The effects of this gadget could have easily been overly confusing, but the film manages to establish how it works quite effectively.
I suppose there are a few things I could quibble about: maybe it strains credibility that the villain's second-in-command would think that someone named Diabolo was working with good intentions all along, and maybe the final battle against the villain's minions gets a bit too slapsticky to take seriously. Otherwise though, I'd say this is pretty solidly one of my favorite non-remake movies to come out of the 2005 Doraemon anime reboot.
Not to mention, Shizuka gets a nice moment where she saves everyone else here. That was a semi-regular occurrence in the classic films, but it's been a while since the last time. The fact that older entries in the Doraemon film series have a better track record of portraying Shizuka is honestly kind of sad, so anytime in the new movies that she gets to do something important instead of standing in the background or playing the damsel in distress can only be taken as a good sign.
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