okay, I now got long shot, double jump and dash. not sure how to proceed though since all the remaining places all seem to need a new kind of shot to destroy those walls, jsut like the one in the mechanics save room :-/
nevermind. in the rooms to the right mechanic right in front of the barrier is the super shot gun. I really cant tell too easy when something important is on the ground, so I overlooked it as background decorations.