The Cures discover what Shindoine has done to Kyousei Maruyama, after Rate becomes ill again. Shindoine reveals how she evolved herself using a Mega Part and can now create GigaByogens from living beings. The Cures attempt to fight the GigaByogen but are easily defeated, so Shindoine leaves to show King Byogen her new powers. During the brief respite, Nodoka, Chiyu, Hinata and Asumi regroup and find Kota in the Zoo, with Kota visibly shaken having witnessed his father turn into a monster. However, Nodoka reassures Kota the Pretty Cure will save his father. When Rate senses the return of the GigaByogen, the girls rush off to face it, but despite their best efforts they are unable to purify the monster with Healing Oasis. Determined not to give up, Nodoka rallies the other Cures and they engage the GigaByogen again. Their determination causes the power of all their elemental bottles to combine and create a new bottle. Rate combines all of their powers into one, forming the Healin' Good Arrow. The Cures use their new items to perform Final Healin' Good Shower to purify the GigaByogen and rescue Kyousei Maruyama.