Glitch through the Mother Brain Zebetites by using a frozen Rinka and i-frames. Freeze the Rinka at its spawn location, then spin jump or down-back onto it after acquiring i-frames to clip inside of the Zebetite, then jump through. I-frames can be acquired from a Rinka hit, a turret shot, or from the Zebetite itself. Note that Zebetites cause i-frames but deal no damage. If Screw Attack is equipped, then a down-back must be used, since spin jumping will cancel i-frames. With Ice+Wave, Samus can freeze the Rinka from above with an angle-down shot; Otherwise Samus must go below, press against the wall, and freeze it with an upward shot. With Ice+Plasma, Samus must be crouched when firing the shot.