93, 1241, and I believe 1 also had ball drop robots. I liked 93 because of their ability to stay under the drop, but 1241 had faster delivery.
177, 469, 45, 173, 492, and 461 all picked up small balls using rollers and the like. So I liked ours best...but I'm really biased , but the technokats system was really great, too.
I remember liking how wildstang (111) herded extremely effectively with their swerve drive, too. Acutally..so many robots herded that those capabilities are far harder to remember.

In general...I was surprised at the lack of robots who were designed to deal with the small balls...but all the ones who intended to, worked very well!