0 1 0Winkler is the boss fight at the end of the intro. One key thing I learned was to always keep away from your sister or you risk both of you bleeding out from his laser beams, which will cost you a life. Also, don't camp in the room where you start - it's narrow and makes it easy to get caught by the beams. Stay away from your sister while circling in and out of the starting area and let her kite/engage him. Dive in for cheap shots at his head while he's busy. When either of you goes down and gets revived, run away as soon as the revive is over. Don't forget your thumbs-up or whatever for a health/armor boost.