That was quite the load of baseball games we got a few days ago.
Surprised that Base Wars wasn't in that batch... or as it is sometimes known as, "Cyber Stadium Series: Base Wars". Wonder if, had it been more successful, they would have expanded the series with more futuristic games featuring robots playing other sports. "Cyber Stadium Series: Hoop Wars" for basketball, perhaps? (I guess there already is a robot football game, Cyberball...)
Funny how in Base Wars, the robots are mostly humanoid, and look similar to each other, except for their lower halves. Some have humanoid legs, but others might have a single wheel, or tank treads, or a flying saucer-like bottom that enables them to hover.
Anyway, that's what I remember Base Wars for - for standing out a bit, with its unique setting and players, in a sea of baseball games. Funny how the NES had so many. I'm sure this one will be mapped eventually. Looking forward to that.
Doing a search for "ball" on the list shows that there are not many of these "ball" games left! Keep up the good work!