Complete section corresponding NSM
You'll probably die a few times in this area unless you A+B+Start whenever you're about to die. Anyhow, start off by going to the right. Swing off, swing off again, and swing off again. (That means look at the pictures because I can't describe it.)
You should land on or near the platform with a fat, happy, and stupid guy with boxing gloves. Trust me, he's an idiot. Just duck while on the platform, and he'll punch above you. Or, just shoot him quickly and he won't even have a chance.
After you take care of him, fall down off the right side and bounce off
the first spring. Don't keep springing off all three in a row, though. As you
spring off the first one, grab diagonally to the upper right and catch the
platform there. Get on it. See the pictures.
Then just jump off the spring, fall off the platform, spring again, and grab hold of that platform with the robot on it. Get up on the platform and blast the robot. Go to the right side of the platform and hook straight up. Bounce off the spring(s) and hook up. You'll grab the platform above.
Time well and blast that robot as well. Then go to the right and just keep hooking up. Kill the fat, stupid, happy guy and go to the left where the barrel is. From there, you need to swing a few times and land on the platform on the left. See the pictures.
When on the platform, you need to use the spring to get some lift, then grab the cylinder thing above, swing off, grab the next one, and swing off, landing in front of the boss door. See the pictures.
The boss is a commander and three lasers, only two of which work. After the greeting, get up onto the first platform and kill the commander. Then quickly hook straight up while no lasers are right there. Blast the two lasers as shown.
Then work your way right, blasting the last laser, then destroy the generator. You get the bulletproof vest after this level, which blocks every other shot. It only blocks some kinds of shots, though. Only one level left to go!