How could anyone resist a title like that?
It's the tie-in movie of the 'Go! Princess PreCure' TV series and it's quite fun. (Technically there's another tie-in movie, Pretty Cure All Stars: Spring Carnival, but that's a team-up for all the PreCures heroines ever, rather than just this year's.)
It comprises three episodes of irregular length, each with a different director, plus a framing sequence of Pafu and Aroma talking to the audience and telling them to wave their Princess Lights. They're so cheap-looking! I don't mind the show spending so much time trying to sell merchandising to children. You just have to roll with it. No, the distracting thing is the way they've got their design process backwards. Instead of having toymakers trying to replicate the latest cool thing in a popular children's show, you have the popular children's show showcasing some desperately cheap and shitty-looking piece of merchandising that looks as if it's (a) made of plastic, and (b) going to fall apart within a week.
UPDATE: I was wrong. Miracle Lights are a regular thing from the PreCure All Stars movies. They get handed out free to all the children in the cinema audience, to be waved during the finale to help the PreCures defeat the villain.
I can't decide whether it would have been great or ghastly to see this in a cinema, surrounded by children shining flashlights in your face.
EPISODE 1: CURE FLORA AND THE MISCHIEVOUS MIRROR (5 minutes)
(Cure Flora is Haruka's transformed PreCure name.)
It's basically the Marx Brothers' mirror scene from Duck Soup. They do it pretty well, too, with Haruka smelling a rat and using her superpowers to challenge her pseudo-reflection. (The fake is an illusion made by comedy ghosts.) Furthermore it's been done as a silent movie, which I enjoyed. The episode feels so natural that it would be easy not to notice, but there's no dialogue and everything's conveyed visually, either through physical action or facial expressions.
It's all-CGI, incidentally, in a rubber-doll style that the TV show only used in snatches in some of the later title sequences. It's fine, but it makes the show look a hundred times more kiddified.
EPISODE 2: THE PUMPKIN KINGDOM'S TREASURE (50 minutes)
This looks like the TV show and is the only hand-drawn episode. The film was broadcast on Hallowe'en, which I suppose makes it episode 38a of the TV show, which you can tell because it takes the girls to Pumpkin Kingdom to meet the Pumpkin Fairies and the Pumpkin Princess, Pampururu. Guess what shape the skirt is on Pampururu's dress! Go on, guess. Hint: it's the same shape as her puffed shoulders. Oh, and the first three Pumpkin Fairies we meet are called Pum, Pu and Kin.
All this is interesting because the TV series only had two worlds: Hope Kingdom and Earth. What's more, Queen Dyspear's minions all had the same approach to destroying people's dreams, as you'll see from their names (Close, Shut, Lock, Stop, Freeze). This is different. It's a third, more overtly fantastical world. Similarly the villain's called Warp and he doesn't just plunge you into despair, but instead perverts you into a greedy, amnesiac version of yourself.
It's an entertaining episode. Nothing too special, but nothing wrong with it. Haruka being the daughter of a sweet shop owner becomes an important part of her character, which is a nice surprise. Towa has evil-detecting powers, which makes sense. (I'm always happy to get more Towa.) Meanwhile Minami does some ballet dancing and Kirara wins a walking competition. This doesn't involve speed or covering the greatest distance, but instead walking down a catwalk. Eh? There's also an evil factory and a giant fire frog.
EPISODE 3: PRECURE AND REFI'S WONDER NIGHT! (20 minutes)
This is another all-CGI episode, but this time cel-shaded (although still more kiddified). It's in the style of the TV show's second closing credits sequence, which you'll eventually discover is because that sequence was swiped from this film. It first appeared here. The TV show then stole it. Watching everything in the wrong order, as I've done, makes the film's use of it somehow more iconic and triumphant.
Bizarrely, this is set in a different Pumpkin Kingdom with a different Pumpkin Princess. They don't even look similar. This is a lot more Tim Burtonish and A Nightmare Before Christmas, with gnarled Dr Seuss-style architecture and no humans except for Princess Refi. Don't think about that too hard.
It's a country of people with pumpkin heads. The little one-eyed Pumpkin Zetsuborgs are cute and even funny (e.g. when waving when they find you), but they're also kinda scary. As for the villain, Night Pumpkin... wow. He stole all the daylight, by the way. This episode looks charming, made me laugh (e.g. Haruka's unintended headbutt) and is probably the coolest in the film.
It's non-essential, but enjoyable. It makes stirring use of the TV show's theme music in key scenes. It's a blatant merchandising cash grab aimed at little girls, but hardly any more than the TV show. I enjoyed it. It might even be better than the majority of anime movies, actually.