Use a Power Bomb to kill any Sidehoppers in the pit below, then roll off and use a second, while exiting G-Mode to destroy the blocks in front of the door. Place the Power Bomb far enough left to hit the blocks, but not so far as to lure the Sidehopper. This is when Samus is on the right-most squiggly plant, or when there is one tile of air between the right wall and the edge of the screen.

Requires:

"canEnterGMode"
"h_canArtificialMorphPowerBomb"
"h_canArtificialMorphPowerBomb"

Clears obstacles: B