No prerequisite. I think the issue you are having is just that your Shadow just doesn’t have enough data. I’ve sparred with my Shadow many times and yes, my shadow has lost BAD to me. And this is AFTER my Shadow had a few wins under its belt.
But I sparred with my Shadow today, and it actually gave me a decent run for my money down to the wire.
My Shadow as of today:
If you add up all my recordings, you can see that I have about 540 recordings already, BUT more than half of the individual match ups are still yellow, meaning I still have a lot more data to record for those match ups to be “complete”. Kan-ra is red because I haven’t fought that match up much at all.
FYI: They seemingly updated the record keeping data some time ago, as before, you could only hold 40 recordings max per match up, but now, as you can see, I have 70 for at least 2 match ups. So yeah, there is a lot of datal to gather in all.
The more recordings you make, the closer your Shadow will emulate you. The more diverse the match ups you record, the stronger overall your shadow will become. Furthermore though, (my opinion) the best way to make your Shadow stronger is continously recording while trading games with real people, either through multiplayer, or Shadow Lab bounty matches. The constant adaptation that you do from game to game teaches your Shadow new things each recording.
Also, record EVERYTHING! Wins, losses, mistakes, EVERYTHING. The more data the better, and as you make less mistakes, so to will your Shadow. If you are constantly judging your performance, weeding out the matches “you don’t like”, your Shadow will suffer. Just play your best, record it all, get better, and your Shadow will get better.