- Author's Saving Throw: The Blu-ray box only has 16 episodes (they are: 1-3, 13, 16, 22-23, 29, 34, 44, 46-48, 50-52). This was apparently intended to cut out all the 'fluff' and only include the most vital (or just fan-preferred, in the case of 34) episodes. But since the set absurdly costs 21k yen (about 175 US dollars), this just angered potential buyers and it ended up bombing hard.
- Contested Sequel: The Periphery Demographic is disappointed with how much more childish this season is compared to previous seasons, which have a wider demographic appeal. In contrast, kids seem to love this one, with its simple characters, bizarre world-building, and bigger focus on the pets.
- Memetic Mutation: Onegai My Jewelpet Kirara Deco due to its plot being highly similar to Onegai My Melody Kirara. And note that both of these series are considered the worst incarnations, and Onegai My Melody Kirara turned out to be a Franchise Killer for the My Melody anime.
- Pretending to be Angela and Labra and arresting people for saying something which ticks them off (like Fandom Heresy).
- Moe: Yamirin. Cute glasses-wearing girl with pigtails and a frilly dress. It helps that she was designed by an in-universe otaku.
- Narm: Labra's death in episode 51 loses all its impact when they show Angela's shocked reaction, which is super-deformed.
- Blue Knight's princely outfit is so over-the-top that it may come across as ridiculous instead of sexy as intended.
- Nightmare Fuel: Episode 25, featuring a village of saury. Coal casts a spell to rot its inhabitants, and we get to see decaying zombie saury as a result. Then the unaffected saury decide to commit suicide by throwing themselves in a fire, to avoid becoming spoiled food. Yes, they do see themselves as food, and think it's a great honor to be killed and eaten by other beings. Even if the whole situation is treated as being absurd, it's pretty freaking horrible when you think about it.
- Pandering to the Base: The series is the end result of what happens when something aimed at little girls excessively panders to the periphery demographic. The anime has done this since the beginning, but the first series had small doses of it and Twinkle had a reasonable balance. However, Sunshine truly spoilt the secondary audiences too much (18-year old characters worried about their future, taboo love and a myriad of obscure pop-culture references are a winning combination for otakus, but not for little kids) and shot their expectations for Kira Deco far too high. Hence, the outrage of the secondary audience when Kira Deco turned out to be Lighter and Softer so it'd be more appealing to kids (its main demographic) again. The Blu-Ray Selection box is just another example of surrendering to the periphery demographic.
- Pink, the sole human girl for half of the show, gets to a wear a wide variety of outfits, which is regarded by some as fanservice for the otaku crowd.
- So Bad, It's Good: What fans it has usually say that the show isn't really "good", but that its ridiculousness and stupidity make it very entertaining.
- They Changed It, Now It Sucks!: Some people dislike this season for being Lighter and Softer and much sillier than the seasons that preceded it.
- They Wasted a Perfectly Good Character:
- Granite only appears in one or two episodes and leaves no impact, despite how in the first of those he's established as Ruby's boyfriend.
- Topaz. She's given a very interesting and unique personality by Jewelpet standards. Unfortunately, she only has one major appearance (the rest is cameos) and the entire point of her character is to explain where Pink's wardrobe comes from.
- This Is Your Premise on Drugs: Generically regarded as Jewelpet on drugs.
- What Do You Mean, It Wasn't Made on Drugs?: Some episodes are so out there that it makes you think the writers were on crack. Exhibit A - the episode with a village of Death Seeker fishes.
- Woolseyism: In episode 1, Opal calls Ruby 'Baka' and a discussion ensues about how Opal is more 'baka' because the word needs the kanji for 'horse' (which Opal is) and 'deer' to be formed. In the Portuguese dub, Opal calls Ruby 'burra', which means both 'stupid' and 'donkey', and Garnet retorts that she is more 'burra' because of the closeness in species between horses and donkeys.
YMMV / Jewelpet Kira Deco!