Ultimate 4

The Ultimate 4 (アルティメット) are four grade Appmon in Digimon Universe: Appli Monsters.

History
The Ultimate 4 were gathered by Leviathan to serve as Knight Unryuji's underlings. They watch as Knight unleashes an L-Virus-infected over L-Town. They later show up to the Applidrivers after Eri Karan refuses Knight's offer of working for Leviathan.