Oh I have that! I got it, like, last week. It's called Pokemon Platinum (in Chinese) but it was released in 2004, long before there was ever such a thing officially. It's a platform game - you can play as Psyduck, Pichu, Abra or Flareon and the all have basically the same projectile attack with different graphics. It's not too bad as far as later Sintax games go, although the slightly-odd jumping physics can lead to missed platforms and swearing and such, and I may or may not be missing some hidden depths here - you have an MP gauge and there are these icons on the status bar but I can't figure out how to do anything with either of them. Oh yeah and the music is from Lemmings again.
...Okay and I just completed it. The final (and only) boss is an Electabuzz. And if the MP bar and icons do anything I never needed them. There's also a scroll you can pick up in each level which serves no apparent purpose, and may or may not be related to the other things - maybe they're all remnants of some unfinished special attack feature that Sintax never bothered to remove. Or maybe I just haven't figured out how to use it yet.