There are scroll PLMs one tile to the right of the bomb blocks which can be used to overload PLMs, turning the bomb blocks to air. However, if Zebes is awake, two Geemers block the way. The Geemer hits can be avoided with Bombs or SpringBall. Alternatively, use a Power Bombs, to kill the Geemers and another to boost over to the left Alcatraz entrance, as the Power Bomb blast will render the bomb blocks solid, unable to be turned to air. This is possible but tricky to do with a single Power Bomb: In direct G-mode, use Samus' i-frames to roll through the first Geemer and horizontally bomb boost onto the ledge. In indirect G-mode, roll immediately and place the Power Bomb just after the first downward slope to jump over both Geemers.