The Dark Masters are the main villains of the fourth arc of Digimon. They control Spiral Mountain.
- MetalSeadramon - River of Power attack sent back through him by WarGreymon with Nova Force. (Playing Games)
- Puppetmon - Killed by MetalGarurumon with Metal Wolf Claw. (Ogremon's Honor)
- Machinedramon - Sliced into pieces by WarGreymon with his claw. (The Crest of Light)
- Piedmon - Knocked into MagnaAngemon's Gate of Destiny by WarGreymon and MetalGarurumon using Terra Force and Giga Missile. (Piedmon's Last Jest)