as a matter of fact, here is the list of these glitches copied from mmhp.net some wouldn't be suitable for a speedrun, but i think some others would, like super jumping, freezing the robots and navigating the pits
Super jump: Hold right on controller two and Mega Man’s jumps will almost touch the top of the screen!
These eggs are perfect for collecting power-ups.
Slow-bo mode: Hold up on controller two for slow motion. (Actually, it’s really only the animations that are slowed down.)
Time stop: Hold up and A on controller two to freeze most robots in their tracks—including Mega Man. (You won’t be able to move unless you jump first. But you can still fire your arm cannon, which is why this is such a useful trick.) Note that robots in motion will usually continue to move, but you can use this to freeze most of the Robot Masters during at least one stage of their attack. Then you can fire away at the helpless robot for an easy victory!
Jump/Stop combo: Hold up, right, and A to freeze the action and give you the super jump!
Invincibility from bottomless pits: If you happen to fall in a pit, quickly press right on controller two and the jump button on controller one to jump out—even after you hear the “death” sound effect! You’ll have to play the rest of the stage without music, but it’s worth it to save your skin!
Navigate bottomless pits: Hold right on controller two, then jump into a bottomless pit. Keep that button down while you move left and right using controller one. You can slide through the pit safely avoiding anything up above. When you’re ready to leave, press jump on controller one to get out. There are a couple of catches to this, though—one, if you stay down there too long, you’ll die; and two, sometimes Mega Man takes damage down there. Still, it’s a useful trick to get past those long bottomless pits without using Rush Jet.
Missed me!
Zombified Mega Man: (Named after the “Zombie” effect in Final Fantasy III.) Here’s a really interesting one to try. While holding right on controller two, jump into a pit. Now hang out down there until you hear the “death” sound effect and your energy meter plunges to zilch. When this happens you must jump out immediately or Mega Man will perish.
Once you are out of the pit, you can journey on with absolutely no energy. No robots will be able to damage you. The disadvantage is you can’t fire your arm cannons (Mega Man no longer has enough energy to do that!), but you are allowed to fire all the Master Weapons you’ve obtained (which run off their own energy supply)—including Rush—which means you’ll be able to defeat the stage boss with no problem!
One final note on this trick: any energy you pick up will cure Mega Man’s “zombie” state by restoring some of his health. He will be able to fire again, but he will also be able to die. An Energy Tank will also do this to him, in case you need to be able to fire again. Weapon energy will not, so you can safely charge up your weapons like normal and still be “zombified.”
Turn a weapon energy capsule into Rush Jet/Marine: Having problems getting past the pink lifts in Spark Man’s stage, or the underground lake in Gemini Man’s stage? Would Rush really come in handy but you haven’t beaten the robot necessary to get the correct form?
Then this trick is for you. First, find a weapon energy pellet or capsule (a capsule would be better as you’ll get more energy for it.) Now, go to your sub screen. If you want Rush Marine, point to the Spark Shooter; if you need Rush Jet point to the Shadow Blades. (You therefore must have these weapons for this trick to work.) Now press right. Rush will appear, wagging his tail. Press A or START. Pick up the energy capsule.
Although the chosen mode won’t appear on your weapons list until you either use it or get it for real, you can now use Rush in this new form. Also, you’ll have to fill up its energy before it will be of much use, but this can get you out of some tight spots!
Sustained Rush Jet: This one’s covered in the Data Base section.
Whacked-Out Level: (Submitted by too many people to name.) Use the super jump listed above to enter the screen in Gemini Man’s level where Proto Man appears. If you position yourself correctly, you will fall straight through the block that Proto Man lands on, before he even blows it up. I hear this will cause his whistle to extend and goof up the graphics for the rest of the level, although I’ve not tried it myself.
Longer Whistle: (Submitted by too many people to name.) I’m told that if you open the subscreen with just the right timing when Proto Man is making an appearance, you can hear more of his whistle than what plays normally. I haven’t tried this, but my guess is this extended whistle is identical to the one which plays during the ending.
Invincibility: Go to the weapons screen, then hold up and A on controller two as you exit the subscreen. Mega Man will get frozen in his faint-warp state and cannot be harmed! This isn’t really useful because you can’t do anything while phased, but it’s a pretty neat trick. (Try it while fighting the Yellow Devil!) Its greatest asset is its use in the trick below...
Longer ending: After beating the game, hold up and A on controller two during the time that Dr. Light is telling Mega Man, “I discovered you lying here when I came in. I wonder who...” Then, keep holding these buttons down! The ending will continue like normal until Mega Man tries to teleport out of the lab. At this point, because you are holding down the freeze buttons, he will get stuck in his teleport stance and nothing will happen. The music will continue to play, and you can sit there and listen to it as long as you keep those buttons held down. (Thanks to Metool for telling me about this.) Try this, as the ending music is actually about two times longer than what you normally hear—and it gets pretty wild too!
