Originally Posted by
Mamba Tabac
The GG version of Shinobi is absolutely nothing like the MS version. Whereas the MS Shinobi is a conversion of the arcade game, the GG games are completely different, and probably share more in common with Revenge of Shinobi (they even have the same music in places), with the added bonus of being able to switch between 5 different coloured ninjas each with their own skills and magic.
I'd probably say that GG Shinobi is my personal favourite Game Gear game, and I'd recommend tracking down a copy asap. The sequel is more of the same, but changes a few powers about and feature bigger levels with more stuff to find.