There is a discussion thread over on PlecoFanatics.com talking about the R2 Fish School Training Kit. I'd never visited that website before, and I'm simply amazed by the variety of cool Plecos there are. Check out this spotted Snow Ball Pleco from Thailand.
I'm never tried to train a Pleco myself. They might be too shy, but I've had some pretty active Plecos before, so I think it might be possible.Surface tricks like basketball might be a challenge though. Anybody using their kit to train Plecos out there? We'd love to hear about it!