Mega Blast/Round 4

Once your (or both) Mega Blast have reappeared on the screen, a group of two Type 6 enemies will come rolling towards them from the right side of the screen, while firing bullets at them; once you have fired a shot at both of these to kill them, a group of eight Type 7 enemies will come flying towards you from the right side of the screen. Once you have fired a shot at each of these to kill them, the second, fourth, sixth, and eighth ones shall leave four blue device packs behind - and once you have collected these, a group of six Type 1 enemies shall come flying towards you from the right side of the screen while firing projectiles at you. Once you have fired a shot at all of these to kill them the sixth one shall leave a green device pack behind; once you have collected it, your (or both) Mega Blast shall start moving downwards as a group of eight Type 5 enemies flies up into view from the bottom of the screen while firing beams at them from behind. Once you've fired a shot at each of them to kill them, the eighth one will leave a white device pack behind - and once you've collected it, another group of six more Type 1 enemies will come flying towards you from the right side of the screen, while firing projectiles at you. Once you have fired a shot at each of them to kill them, the twelfth one shall leave another white device pack behind; once you have collected it, another group of eight more Type 7 enemies will come flying towards you, from the right side of the screen. Once you have fired a shot at each of them to kill them, the sixteenth one shall leave a third white device pack behind - and once you have collected it, six smoke clouds (which can be blocked for 100 extra points apiece) shall emerge from a hole in the ground at the bottom of the screen. Once you've bypassed the hole, you will come to a Type 3 enemy that is firing missiles (which can be blocked for 100 extra points apiece) at you from its position on a platform; once you have fired a shot at it to kill it, another group of six Type 5 enemies will fly up into view from the bottom of the screen while firing beams at you from behind. Once you've fired a shot at all of these to kill them, the fourteenth one shall leave another green device pack behind - and once you've collected it, a third group of six more Type 1 enemies will come flying towards you from the right side of the screen while firing projectiles at you. Once you've fired a shot at each of them to kill them the eighteenth one will leave a third green device pack behind; once you have collected it, a second group of seven more Type 6 enemies will come rolling towards you from the right side of the screen while firing bullets at you. Once you fire a shot at all of them to kill them a fourth group of six more Type 1 enemies will come flying towards you from the right side of the screen while firing projectiles at you - and once you've fired a shot at each of these to kill them, the twenty-fourth one will leave a fourth white device pack behind. NOTE: It is possible to avoid having to kill the second group of Type 6 enemies and the fourth group of Type 1 enemies by moving down after collecting the third green device pack to come to a wall that's made up from twenty-five square blocks, then firing a shot at each of the blocks to destroy them and create a path through them before you are forced to crash.

Once you have collected the fourth white device pack (providing you killed the twenty-fourth Type 1 enemy), a third group of six more Type 5 enemies will fly down into view from the top of the screen while firing beams at you; once you have fired a shot at each of these to kill them, the eighteenth one will leave a red device pack behind. Once you've collected it your (or both) Mega Blast will start moving upwards as a fourth group of six more Type 5 enemies flies down into view from the top of the screen while firing beams at you. Once you have fired a shot at each of these to kill them the twenty-fourth one shall leave another red device pack behind - and once you've collected it a group of five Type 9 enemies will come flying towards you from the right side of the screen, while firing projectiles at you. Once you've fired a shot at all of these to kill them, a fifth group of six more Type 1 enemies shall come flying towards you from the right side of the screen while firing projectiles at you; once you have fired a shot at each of them to kill them, a third group of two more Type 6 enemies shall come rolling toward you from the right side of the screen, while firing bullets at you. Once you've fired a shot at both of them to kill them you'll come to another wall that's made up from twenty-five square blocks - and once you've fired a shot at enough of those blocks to destroy them and create a passage through the wall, you have to move up as a Type 8 enemy and a tenth Type 6 enemy come flying and rolling towards you from the right side of the screen while firing projectiles and bullets at you. Once you fire enough shots at the Type 8 enemy to destroy its barrier and kill it (and a single shot at the Type 6 enemy to kill it), your (or both) Mega Blast shall start moving downwards again, and you'll have to move back left as a fourth group of two more Type 6 enemies rolls towards you from the right screen side while firing bullets at you; once you have fired a shot at both of them to kill them, you will have to move up as you come to another wall made up from eight rectangular blocks. Once you have fired a shot at enough of the blocks to destroy them and create a passage through the wall, you have to move down as you come to a third wall made up from six more square blocks - and once you've fired a shot at enough of the blocks to destroy them, and create a passage through the wall, you have to move up as two final groups of six more Type 1 enemies come flying towards you from the right side of the screen while firing projectiles toward you. Once you have fired a shot at each of them to kill them, your (or both) Mega Blast will start moving downwards once again, and undergo fourth dramatic increase in speed (which, yet again, means that a boss battle is quickly approaching) as the following text is displayed on the screen:

'EMERGENCY! B.W. PROGRAM ACTIVATED'

TARGET :CONFIRMED

DISTANCE :H.P FD4A V.P 6C2D

FILENAME :STING

WEAK POINT :GREEN CORE READY

"Wonder H" (filename: Sting) will then fly into view, from the right side of the screen; it attacks by flying up (or down) to the top (or bottom) of the screen while firing beams at you from its side-mounted cannons and its green cores (the latter of which can only be hit by downward in the case of the top one, and upward in the case of the bottom one, shots!), and once you have fired off enough shots at both green cores to destroy them (in contrast to the two halves of "Lovelorn" on the second round, they do not take damage together), it shall explode and fall off the bottom of the screen. Your (or both) Mega Blast will then fly off the screen's right side as the text "ROUND 4 OVER. NICE PLAY! GO TO NEXT ROUND." appears on it, and proceed to Round 5.