Doc robot stages: Needle and Shadow. After defeating all 8 robot masters, four new stages appear containing recreations of the bosses from Mega Man 2. A mysterious robot known as 'Doc Robot' has the capability of mimicking these robot masters from MM2.
Needle mans stage: Air man and Crash man. Shadow mans stage: Wood man and Heat man.
Doc Robot Stages Spark/Gemini: http://www.youtube.com/watch?v=ItKRwamjK3o
Comments, requests, and suggestions are always welcome! All music/sound copyright Capcom.