The Juggernaut, also known as Shaggai, is an executable program from Hypnos. Its function is to open a portal between the Real World and the Digital World, sending any near Digimon (called by Hypnos as "Wild Ones") back to where they came from. It was used many times troughout the Digimon Tamers series, sealing many hostile Digimon. However, it was useless against IceDevimon and the Devas, even being used by them to Bioemerge in the Real World. Juggernaut was later downloaded into MegaGargomon to send the D-Reaper back to the Digital World, turning it into a harmless program, no more complex than a calculator.