X Program

The X Program appeared when Yggdrasil initiated the X Program to delete all but a selected Digimon when the Digital World was on the brink of collapse. Some Digimon developed X Antibodies and became (name of Digimon) X. They fled to a new world with 3 locations consisting of a past-like plain, a nature plain, and a future-like plain. Yggdrasil sent the Royal Knights to eliminate the X Digimon.