Keroro Gunsou Movie 4: Gekishin Dragon Warriors de Arimasu!

Synopsis

Worldwide, enormous enigmatic entities dubbed the "Ryū no Shippo" (Dragon Tails) have materialized, prompting the Keroro Platoon to launch a global probe. While carrying out their research, Tamama suddenly vanishes, compelling the platoon to track him down. Their pursuit brings them to Mont-Saint-Michel in France, where they encounter a mysterious girl called Sion, who possesses the cryptic Ryū no Hon (Dragon Book). Unbeknownst to them, this meeting will expose hidden truths about Sion and may set off a worldwide catastrophe capable of annihilating the world as they know it.