Fifteen Cures gather around in a circular formation with Cure Blossom and Cure Marine in the center. All of them upgrade to Cure Rainbow and recite an incantation. They then summon their battle items, before unleashing a powerful blast to the enemy. The power of the blast depends on how much the Cures believe in the light of hope. This attack is strengthened when their belief in the light of hope is.
All: Afureru kibō yūki awasete! Hikari kagayaku mirai no todoke!
All: Purikyua Reinbō Jueru Sorūshon!
All: The courage that comes from overflowing hope! A future shining with light!
All: Pretty Cure Rainbow Jewel Solution!
- Rainbow Jewel Solution is the fourth attack to contain the word "Rainbow", preceded by Rainbow Therapy, Rainbow Storm, Rainbow Rose Explosion, and is followed by Rainbow Healing, Rainbow Burst, Royal Rainbow Burst, Ultra Rainbow Burst, Miracle Rainbow Burst, Rainbow Tornado, and Extreme Rainbow.
- It is the first attack to contain the word "Jewel".
- It is the second attack to contain the word "Solution", preceded by Starlight Solution.
- This is the first attack that is performed by multiple Cures in their upgraded form.