Thread:KrytenKoro/@comment-31365078-20181001235232/@comment-134861-20181002020045

https://digimon.wikia.com/wiki/Digimon_World_Data_Squad/Digimon_Encyclopedia#WarGreymon_X

then Digimon Battle and Masters also had X digimon, along with Heroes!

My personal opinion is that "X-Antibody" is a naming convention, like having levels in the name (Ex. Daemon Ultra), and can be autodubbed based on DWDS. If you disagree, feel free to bring it up on the editing guidelines page.