ChronoCore

The Chrono Core, also called Chrono Data, is/are (It is controversial whether Chrono Core is one entity, or multiples. At one point, ChaosGallantmon Core says "We Chrono Data..." but Chrono core is only represented by one sprite overworld.) the main enemy/enemies of Digimon Word: Dawn/Dusk. At one point, ChaosGallantmon C said "We Chrono Data control all digivolution here in the digital world." Why Chrono Core did not use this ability before the ChaosGrimmon fight is unknown, but is most likely so that the fight is fair.