Ninja Gaiden for Game Gear is quite unlike the NES version or even its cousin on the Master System. It has a similar (but simpler) feel as the Master System version, but has the wall climbing element of the NES game. But like the others, it has ninjas. And ninjas are cool.
The key to a TAS of this game is special weapon maintenance. Bosses receive double the damage when hit with special weapons, so managing the weapons used and conserving force are critical to optimizing this game.