To add more to my past comment, there is a big misconception where people believe that the anime is the center of the franchise.
The anime was just a consequence of the success Digimon during 1997-1999
and it would have never happened if it weren't for the videogames, the card game and the virtual pets.
I don't say that the anime isn't important, I just say that the anime isn't the center of the franchise, its just an interpretation made by people who only touch the basic concepts of Digimon and basically make "Fan Works" instead of developing more about we already have in the main Lore.