Cat Noir cataclysms' Phalanthus.

"Don't you know you don't bring a fish to a cat fight? CATACLYSM!" Cat Noir raised his hand, which covered itself in a mist of raw destructive power.

"Cat Noir, wait, don't--"

Cat Noir lept straight for the gargantuan fish-beast and ran his lethal claws in between its eyes. Cracks covered the sentimonster's body like an egg. Whether through pain or blind rage, Phalanthus's bug-eyes rolled around in its head and it gave a roar as the monster started flopping around like a fish on deck, quaking the ground, collapsing nearby trees, shattering windows and bringing indiscriminate calamity to the surrounding area. Dark Cupid lost his balance before he takes to the air, trying and failing to calm his unruly dolphin companion.

"Oooh right. Sentimonster."

Ladybug facepalmed.