Bomb Man (Explosive City)
Start heading east, blasting through the Fleas. You should soon reach an area with pitfalls and pillars. Wait for a Bombomb to fly up from the pitfall and e xplode, then jump across to the next pillar. Repeat this until you reach a ledge. Get rid of the Screw Bombers and grab the two power-ups. Climb up the ladder. Continue up the ladder, avoiding the Beaks' shots. Ignore the power-up (unless you really need it) and continue climbing up. Head west again. When you see a Sniper Joe, jump. This should trigger him to jump or shoot, meaning you can blast him away. Keep going until you another series of pitfalls. Now you'll face a combination of Killer Bullets and Beaks; trust me, it sounds and looks harder than it really is. After going around the pitfalls, you'll reach an area with Spines. Jump up the blocks and freeze the Spine when he is farthest from you. Now, jump up and climb the ladder. Climb up and jump across the spikes. Make sure that there is a Killer Bullet halfway across the screen when you start jumping, otherwise you could be hit in mid-air and fall into the spikes. Go up the ladder again to reach a similar area. Wait for the Flying Shell to shoot twice, then jump onto the block. Now jump onto the top block and wait for another Flying Shell to get directly under you. Now jump to the next block and to safety. Keep going east, kill the Sniper Joe, and grab a 1-Up. Drop down the hole and follow the path. Kill another Sniper Joe and go through the double gates. Climb down the ladder carefully and move when the Octopus Batteries give you enough room. You'll fall into Bomb Man's lair. He'll jump over you and start hurling bombs at you. Run halfway across the screen and shoot the Mega Buster at him. When he throws a bomb, jump up and towards the wall opposite Bomb Man to avoid the impact, then run back while shooting. When he jumps back to your side, head to the opposite side and repeat the strategy until he dies. When he's dead, grab the orb for the Hyper Bomb.
Guts Man (Rocky Canyon)
Head east and kill the Mets when their face shows. Try to avoid their three-way shots. After killing them, you'll reach a ledge. This part is very tough. Jump onto the green platform and ride on it until you can see another platform below it. Jump onto this one when it is away from the hole in the tracks. When this platform reaches the eastern edge of his tracks, you can see another platform below it. Jump onto this one (beware, there are many pitfalls in the track ). Ride this platform east, jumping over the pitfalls, and jump to the ledge. The only real way to see what I mean is to play here. If you find the line-guided platforms too challenging, the only alternative is to complete Elec Man's stage twice (Once to get the Thunder Beam from Elec Man, and then a second time to unearth the Magnet Beam by using the Thunder Beam to destroy the Super Arm Blocks in front of it) and then use the Magnet Beam to get across. You'll face a pack of three Bladers. Kill or avoid them and head east. Get the power-up and continue. Kill off the Picket Men (they don't do much damage) as you jump across the ledges. Now drop down and hold left. You'll land on a pillar. Jump across and fall down, this time holding right. Kill the Bladers and grab the two small power-ups. Fall down the middle hole holding left and you should land on a bridge. Jump across to get a 1-Up. Drop down another hole. Avoid or kill the Big Eye and go through the double gates. Follow the tunnel, killing a few Mets. Equip the Hyper Bomb and go through the other gate into Guts Man's lair. Guts Man's Super Arm throws a rock and it will shatter into smaller pieces which also hit for damage. To top it off, he jumps up and down repeatedly and when he lands on the ground, he causes an earthquake. You can avoid this if you are in the air, otherwise you will be stunned. Anyway run forward and throw a Hyper Bomb at him. Jump when he does, so you won't be stunned, then throw another bomb at him. 3 bombs should take care of him. Grab the orb to get the Super Arm.
Cut Man (Sharp Utensil Workhouse)
Climb up the ladder and shoot the Blader that appears. You'll have to kill some more as you head east. Kill the Beaks and climb up. You'll have to climb up through three more levels, each with three Beaks. Simply avoid their shots and make the appropriate jumps. At the top, you'll see a machine that spits out Super Cutters. Run past and kill the blue Fleas that get in your way. Make your way to an area with ladders and Octopus Batteries. Kill them all and climb up the ladders. Make your way through three more of these floors. Run past the Super Cutters. Head east and kill the Bladers. Grab the big power-up and drop down the ladder. Drop down two more ladders into another big area. Avoid the Big Eye and go through the double gates. Kill the Screw Bombers, equip the Super Arm and cross the second pair of double gates into CutMan's lair. He shoots out the Rolling Cutter then jumps after it. Stay on the ledge until he shoot at you, then jump off. While he's still on the ledge, grab a block and hurl it at him to take away half his life bar. If you can, throw the other one at him to finish the job. Otherwise, wait for a good time and throw it then. Grab the orb to get the Rolling Cutter.
Elec Man (Electron Tower)
You'll start in an area with four ledges, three with a Spine. One Rolling Cutter will kill one of these guys. Make your way up through this room and the next. Make your way past the electric charges and to the ladder. Get to the ledge and wait. Some Watchers will show up from the bottom and top of the screen. Kill them all off before climbing up the ladder. Same story in the next room. After those two rooms, you'll face a new challenge... well, moderate challenge. Blocks will appear and disappear, leading the way to two ladders. The left ladder leads to weapon power-ups and the exit, the right leads to the exit. So, you should take the left ladder if you used the Rolling Cutter. To get to the left ladder, jump onto the first block, then the second. Wait for the third to appear, then jump, after about half a second, in the direction of the fourth block (northwest). You should land on the fresh block. Quickly jump to the ladder and climb up. Get the power-ups and jump on the block bridge that just appeared. Now, head up. Jump from block to block (ignore the power-up) and climb the ladder. Wait for the Watchers to appear and kill them. You can take either the right or the left ladder, they lead to the same place. Climb up through two more screens to reach an area with a few throwable blocks with an item behind them. Throw the blocks away to get the all-important Magnet Beam (if you don't have the Super Arm, come back here with the Thunder Beam to get the item). Again, you can take either ladder, but I suggest taking the left ladder. Either way, you'll have to watch out for the electric beams that shoot out. Cross a few more rooms to reach a flat area. Head east across the blocks and climb the ladder. Jump over the blocks (they shoot electricity) and climb another ladder. Avoid the Big Eye and go through the double gates. Climb the ladder (watch out for electricity). After two screens of this ladder stuff, you'll reach Elec Man's lair. Immediately jump on the ledge and equip the Rolling Cutter (if you don't jump, he'll hit you with a Thunder Beam). Shoot the Rolling Cutter at him, he'll die after three hits. Grab the orb to get the Thunder Beam.
Ice Man (Frigid Jungle)
Head east, shooting at the Crazy Razys. When you fall into the water, you'll notice mobility is slow. Who would have guessed? Kill the Pepes while jumping from pillar to pillar. When you get out the water, fall down the hole and onto the slippery ice. Kill the Octopus Batteries and grab the big power-up. Now, fall down the tube and kill the Spine with the Rolling Cutter. Rather than waiting for the blocks to form and jumping up using them, equip the Magnet Beam. Shoot out ledges for you to climb on. Fall down another tube and repeat what you just did to reach the ice ledge. Head east until you reach an open gap. Equip the Magnet Beam, then jump on the Foot Holder. The Foot Holder will start shooting, making it hard for you to jump the next Foot Holder. If you can, use the Magnet Beam to simplify things. Snag the weapon power-up (for the Magnet Beam) and re-equip the Mega Buster. Jump from Foot Holder to Foot Holder, blasting the Pepes, until you reach an ice ledge. Fall down the tube while holding left to grab the 1-Up. Fall down the tube again, also holding down left. Grab the power-ups and drop down to the next room. Avoid the Big Eye and go through the double gates. Kill the Pepes while running through. Equip the Thunder Beam and take the double gates into Ice Man's lair. He'll shoot six Ice Slashers at you. Just shoot the Thunder Beam at him, and when it makes contact, press Select rapidly. Each pause/unpause will register new damage, thus killing IceMan quickly. Grab the orb to get the Ice Slasher.
Fire Man (Burning Incinerator)
Head up the ladders, killing the Screw Bombers. Follow the path to the lava pit. Three Tackle Fires will shoot up from the lava and coast back down - watch out for them. Jump across the platforms and climb up the ladder to the next screen. Ignore the power-ups (unless you really need them) and proceed to the next screen. Both the upper and lower paths lead to the same place, so take the lower one. Watch out for the flame-throwers when you jump up. Cross over to the edge and fall onto the ladder. Grab the power-ups and descend. Fall down the left hole (the one in the center of the room is not a hole at all) and hold right. Make your way across this large room and climb the ladder. Use the Magnet Beam to get to the next platform (rather than trying to go under the fire shots) and climb the ladder. Make your way to the double gates and enter them. Kill the Screw Bombers on the ceiling as you make your way to the gate into Fire Man's lair. Equip the Ice Slasher and enter. Fire Man shoots the Fire Storm at you, which leaves small flames burning on the ground. Start shooting the Ice Slasher and do not stop, because he will also barrage you with his weapon. He'll die first. Grab the orb to get the Fire Storm.
Dr. Wily, Stage 1: Yellow Devil
Equip the Ice Slasher and freeze the Big Eyes that obstruct your path while they are jumping high. When you reach the wall, equip the Super Arm and throw the blocks away. Now re-equip the Ice Slasher. Instead of shooting the Ice Slasher from the raised platform, drop to the floor and try to time it so that the tower is frozen with enough space for Mega Man to walk through. Now climb the ladder to the next room. Climb up, get the power-up and fall to the next block. Jump and climb the ladder. Kill the Fleas and throw the blocks out of the way. Descend to the next area. Watch out for the Killer Bullets as you cross the spikes and fall to the next area. Use the Magnet Beam to cross over to the third Foot Holder, then jump to the fourth Foot Holder and to the land mass. Refill the Magnet Beam and climb the ladder. You must have a full Magnet Beam energy to this room. Use it to climb up over the first ledge, then up to the ladder. Now head east into the Yellow Devil's lair. Run to the far side of the room and jump forward over the flying slimes. The second he forms, equip the Thunder Beam. Jump and shoot it so that it will hit his eye. The pattern of flying slimes is set, so memorize it. Repeat that process until he dies.Just shoot the Thunder Beam at him (the eye), and when it makes contact, press Select rapidly. Each pause/unpause will register new damage, thus killing It like It did with IceMan quickly.
Dr. Wily, Stage 2: Copy Robot
Try not to lose any hit points in this first area. To do this, always wait at the edge of a ledge to see if any Bladers are there. At the other end of the area, head towards the weapon energy. Instead, you'll fall through an invisible area and right into Cut Man's area. You have to kill him with the Mega Buster. Just keep shooting at him and jump over his Rolling Cutter. When he's dead, fall down a pit in the left side of the room. Cross the gaps in this area, watching out for fire from Screw Bombers. There is another invisible pit on the other side, this time leading to Elec Man. Kill him with the Rolling Cutter and fall down yet another pit. Cross the gaps again, this time watching out for the Bombombombs that fly up. Climb down the long tower, using the Rolling Cutter or Thunder Beam to get rid of the Octopus Batteries. At the end, you'll enter an odd room where you'll have to fight your clone. Run to the left and equip the Thunder Beam. Immediately shoot and start pressing Select. Stop this if he hits you with the Thunder Beam. Otherwise, kill him with a few super shots.
Dr. Wily, Stage 3: CWU-01P
Kill the Octopus Batteries and fall into the horizontal hallway. Run until a tidal wave comes and pushes you forward. Just press forward and shoot and you will make it past the fleets of Pepes and Killer Bullets that attack you. Once you get out of the tunnel, head east into the boss chamber. CWU-01Ps will come out of holes in the left, right and top of the chamber. If the CWU-01P comes from the right hole, it will go left over your head and circle around the room. If it comes from the top, it will go straight down and circle around the room. If it comes from the left, it will go straight across the room, down, and around the room. Kill the first three CWU-01Ps by jumping and shooting rapidly. Then equip the Super Arm and hurl the blocks at the next four CWU-01Ps.
Dr. Wily, Stage 4: Wily Machine
Wait and kill the Watchers that appear, then climb the ladder. Climb as far up as you can and attack the Watchers that appear. Use the Magnet Beam to climb up and grab the weapon power-up. Now head east through the Screw Bomber-filled hallway until you reach a ledge. That moving platform is back! Use the Magnet Beam to get to the other side, and hang onto the small ladder near an extra life and a Yashichi. Drop down onto the platform, then onto the block with a 1-Up. Use the Magnet Beam to get the Yashichi, then head back to the ladder and take the teleporter. You'll run into the four bosses you have yet to re-kill.
Head east and equip the Thunder Beam. Power it up and go through the double gates to face Dr. Wily. Shoot the Thunder Beam at the purple portion of his ship, then rapidly hit Select to inflict massive damage. After his ship is destroyed, equip the Rolling Cutter and shoot it at Dr. Wily. Again, hit select repeatedly to cause massive damage and defeat Wily.
Enjoy the ending!