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To The Planet Of Rainbows☆ Blue Cat's Secret! (虹の星へ☆ブルーキャットのヒミツ! Niji no Hoshi e☆ Burū Kyatto no Himitsu!?) is the 19th episode of Star☆Twinkle Pretty Cure and is the 752nd episode of the Pretty Cure franchise overall.


Hikaru and the others visit Planet Rainbow, where they meet the fossilized inhabitants. On top of that, they stumble upon Blue Cat's hideout...


The episode begins with the girls, Fuwa, and Prunce arriving at Planet Rainbow, a signal from there appeared on Lala's Star Color Pendant. Once they arrive, they discover that the once live inhabitants have been turned to stone. They enter a strange cave and Hikaru finds a wall that she can lean through, leading them to realize its a hologram.

Following through it, they find more people turned to stone. At the end of the cave, they find a pile of rainbow treasures and the Gemini Star Princess Pen. Suddenly, Aiwarn and Bakenyan arrive. Aiwarn reveals that she was the one who turned the people into stone, using the corrupted Aries pen. She taunts the stupid residence and feels no remorse.

The girls transform into Pretty Cure and during the battle, Aiwarn takes Fuwa. She picks up a scent from Bakenyan that seems familiar, and it turns out that it was actually Blue Cat in disguise. Blue Cat explains that she infiltrated as Bakenyan to get more information of the Princess Pens and cause of Planet Rainbow, as one of its people. Aiwarn is furious upon learning this, and she turns a miner nearby Nottoriga. Blue Cat tries to stop her but she is knocked back. Milky comes to her defense and expresses that she understand what she is going through. She is sure the people can be restored, because despite being turned into stone, they still have feelings.

Blue Cat warns the girls to cover their eyes, and she throws a flash grenade at the Nottriga causing Aiwarn to drop the Gemini pen and the corrupted Aries pen. Milky retrieves the Gemini pen, but Aiwarn gets the Aries pen. Milky uses Gemini Milky Shock and she and the others finish it off with Southern Cross Shot. After Aiwarn retreats, the girls revive the Gemini Star Princesses.

The girls offer Blue Cat help but she declines. She suddenly throws a bomb of smoke and steals all the Star Princess Pens, including Fuwa. She claims that the four girls' attacks did not restore the miner back to normal, but she needs the pens to grant her wish, the revival of Rainbow Planet.


Pretty Cure



Secondary Characters

Major Events

  • Hoshina Harukichi witnesses the Cure's rocket leaving Earth.
  • The Cures visit Planet Rainbow for the first time.
  • It is revealed that Aiwarn turned most of Rainbow's inhabitants to stone in an accident.
  • It is also revealed that Bakenyan is actually Blue Cat.
  • Cure Milky retrieves the Gemini Princess Star Color Pen and performs Gemini Milky Shock for the first time.
    • They then revive the Gemini Star Princesses soon after.
  • Blue Cat steals the Princess Star Color Pens the Cures collected so far and kidnaps Fuwa.

Constellation Fortune Telling

~Constellation Fortune Telling - Episode 19~
(June 9-15, 2019)
Horoscope Description Lucky Item Lucky Color Lucky Number


"Let's love with everyone" "A tomato that makes you become courage"


"You can make new friends" "A ring that makes you happy"


"You'll get the attention in the surroundings" "A gummy that helps you get a beautiful voice"


Main Page: STPC19/Image Gallery

Episode Preview


スター☆トゥインクルプリキュア 第19話予告 「 虹の星へ☆ブルーキャットのヒミツ!」

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Star☆Twinkle Pretty Cure episode 18 Star☆Twinkle Pretty Cure episode 20

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