Nemisis is the newest Evil Renegade Power Suit Combiner. But this GoBot toy remains a mystery. I have never seen or heard of one of these being found. The photo you see comes from the 1986 GoBot catalog insert found in later boxed GoBots of that year.
Nemisis transforms into a tank instead of a jet like Grungy or Courageous. A Machine Robo version was produced which was in blue and grey and has a head appear when you push back the cockpit. What is interesting about this Nemisis pictured is that it has it's head hidden in the cockpit. This Nemisis might be a recolor of the original, or possibly a new and cheaper version with the head change. The Machine Robo Nemisis also has different colored power suits. There are also more weapons and they are unique to him.