Digimon Universe: App Monsters

Invasion! The Ultimate Appmons, Ultimate 4! (1x37)

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Haru, Eri, Torajirou and Rei are attacked by the Ultimate 4, a team of powerful Appmon under Leviathan's that easily destroy both their buddies and AppliDrives. Just as they are about to be killed as well, Yūjin and Shutmon appear and face the enemies by themselves to help them escape.