Dark Masters

The Dark Masters (ダークマスターズ) are a group of four Mega-level Digimon created by Apocalymon who have banded together to conquer the Digital World.

Digimon Soul Chaser
The four Dark Masters fight against Agumon, Gabumon,, Garudamon, Zudomon, and MagnaAngemon. They manage to defeat Garudamon, MegaKabuterimon, and Garudamon, which leads Agumon and Gabumon to Warp Digivolve to WarGreymon and MetalGarurumon. WarGreymon defeats Machinedramon and MetalSeadramon, MetalGarurumon defeats Puppetmon, and then MagnaAngemon defeats Piedmon. Apocalymon suddenly appears, and reverts the trio back to Agumon, Gabumon, and Patamon.

They later defeat WarGreymon, MetalGarurumon, and Piximon, but are defeated in turn after WarGreymon and MetalGarurumon DNA digivolve into Omnimon.

Notes and references
Meister der Dunkelheit Dark Masters Władcy Ciemności