Tsunami

Head down the shaft, use the save room, and work your way right to the shaft. Use the Speed Booster to descend further, then enter the room where you previously found the Hi-Jump Boots (beside a blue 2x1 room).

Restore your energy and missiles in the save room. Roll left under the statue to enter the next room.

Bomb through a pair of blocks. Place more bombs to the left of these blocks to create a hole above you. Jump through this hole into the tunnel above. Bomb to the left to reach a ledge. Jump left from the end of the ledge to grab a wall, then proceed left through the door, avoiding a jumping enemy.

Head left, defeat all flying and ground enemies, and clear away blocks with your weapons and bombs. Return right to the door. If the lone block reappears, shoot it. Run left to activate the Speed Booster and jump at the top of the curved ramp to break through the wall ahead. You can optionally defeat any enemies here. Drop left and go through the door.

Defeat the large leaper with missiles and collect its drops. Continue onward and use the save room.

Enter the next room and bomb near the door to create a hole. Drop down and go through the left door.

Shoot the spawning enemies as you move left. Enter the door when you reach it.

Drop into the fake lava if necessary. Use a missile to open the left door and access the map room to get the map data.

Return to the previous room and drop into the fake lava. Shoot the enemies as you head left and drop down further. Shoot the blocks on your right and carefully descend the right side of the shaft. Enter the door on your right.

As you approach the first gap, angle your gun down to shoot the lava enemy. Jump across the platforms, shooting divers and other enemies. After crossing the lava, proceed through the nearby door.

Shoot the ground near the right door and drop down the shaft. Enter the door on your right.

Freeze jumping enemies if needed as you jump over lava and reach a small wall. Freeze the next jumper as you cross the gap. Roll into a ball and jump, setting bombs above you to reveal a Missile Tank. Grab it and continue right. Jump across more platforms, avoiding enemies, and collect a second Missile Tank at the end of the room.

Return to the small shaft in the previous room and climb to the top. Go through the right door.

Shoot divers and vines until you encounter a diver caught in a vine. Use missiles to destroy it. Continue right past more vines and divers, then go through the door ahead and proceed to the save room.

Return to the previous room. Shoot the ground near the left door, drop into the fake lava, and enter the door at the bottom.

Use bombs to destroy the walls and missiles to defeat the large leaper. Use a missile to open the door ahead.

Approach the statue and break open the container to find the Wave Beam. This beam allows you to pass through solid objects.