Not so impossible to find anymore...

http://hg101.classicgaming.gamespy.com/bubsy/bubsy.htm

Thanks to this site, the Bubsy pilot is now available online.

I haven't seen it in years...and good lord, I can see why a series was never made out of it. It's a little too random for its own good and Bubsy's catchphrase is used to the point of annoyance. But it was certainly a nice throwback to that era of videogames...