Trinity Explosion (トリニティエクスプロジオン Toriniti Ekusupurojion?) is the second group attack that the Cures use in Go! Princess Pretty Cure. It is first used in episode 18 and it requires the Crystal Princess Rods and the Miracle Lily, Bubble and Shooting Star Dress Up Keys, and the Cures need to be in their third Mode Elegant form.
The three Cures insert their Lily, Bubble and Shooting Star Keys into their Princess Perfumes to change into their Mode Elegant. They then place their Dress Up Keys into their Crystal Princess Rods and the Miracle Ribbon Charms are added to the back of the rods. They then make a pose with the rods. They rise the rods into the sky and cross them as they glow purple, blue and white. The ribbons become longer and the girls twirl around the girls. The ribbons form a crown which sends a powerful rainbow-colored blast towards the enemy. They spin their rods to create more energy so the enemy is purified in a flash of lily petals. Afterwards, Flora says "Gokigen'you".
Cure Flora, Mermaid and Twinkle: エクスチェンジ！モード・エレガント！
Cure Flora: リリイ！
Cure Mermaid: バブル！
Cure Twinkle: シューティングスター！
Cure Flora, Mermaid and Twinkle: 輝け！3つの力！
Cure Flora, Mermaid and Twinkle: プリキュア! トリニティエクスプロジオン！
Cure Flora, Mermaid and Twinkle: Ekusuchenji! Mōdo Ereganto!
Cure Flora: Riri!
Cure Mermaid: Baburu!
Cure Twinkle: Shūtingu Sutā!
Cure Flora, Mermaid and Twinkle: Kagayake! Mittsu no chikara!
Cure Flora, Mermaid and Twinkle: Purikyua! Toriniti Ekusupurojion!
Cure Flora, Mermaid and Twinkle: Exchange! Mode Elegant!
Cure Flora: Lily!
Cure Mermaid: Bubble!
Cure Twinkle: Shooting Star!
Cure Flora, Mermaid and Twinkle: Sparkle! The power of three!
Cure Flora, Mermaid and Twinkle: Pretty Cure! Trinity Explosion!
- In episode 30, it was revealed in a flashback that the Past Princess Pretty Cure had used this attack against Dyspear.