I've never heard of Konro Man's diary before. Is it in the manual? The game itself? Surprised to see a 20XX date for RnF:CftF when the intro used 200X. Must have been a typo.
Rockman Shadow and the Dimensions may have been apart, or even started the war.
Only if R. Shadow was present prior to the X-series, what with time-travel and whatnot.
In my initial interpretation those old robots were used by humans against humans, but who knows. The people of 21XX never seemed familiar with recent machine sentience, let alone the concept of irregulars. However, the implied time frame of late 20XX to early 21XX (before X) does correspond nicely.
I'm reminded that beamsabers are not a technology that exists in 20XX. They're a 21XX product. And R. Shadow clearly has one.