Digimon Savers the Movie: Kyuukyoku Power! Burst Mode Hatsudou!!

Synopsis

The human world has been attacked by an unknown force. Using poisoned thorns, it has put all humans to sleep. Agumon, Gaomon and Lalamon are the only ones left to defeat this enemy. Guided by Rhythm, a young girl they saved, they learn that their enemy is called Argomon. But what can the three digimon do, when they can't even evolve.

(Source: Anime News Network)