Cool, you saw the obvious "cat scratch fever" joke like i did! I could probably read 100 reviews of Boxers Blow and no one will ever know exactly what happens in that movie, it's just way too confusing. The mysterious John, the guy dressed like a Mario Brother, the non-asian asian girl, Cobra, Catman's partner recovering from being killed in the previous film, and worm eating. Bleech!
The robovampire "sequel" is called Counter Destroyer. It has something to do with dreams, so either Robovampire is in movie B, or Godfrey Ho threw in extra Robovampire footage during one of the dream sequences. You can get it on DVD with a crazy Indonesian flick called Magic of the Universe:
http://www.amazon.com/gp/product/cast-crew/B000F5GO6O/ref=imdbdppd_castcrew_1/104-0514177-5331111?ie=UTF8I'm planning to get to both of them soon, but with my backlog and grad school it might be a while before I can have good reviews written of them.
I see you've run into a few Starman movies as well!