Mega Man 4: Secret Weapons
In Dive Man's level, after beating the second whale, there should be a hole nearby. Fall in it and dodge all the spikes to find the Wire Power. This power allows you to hang on the ceiling and hit enemies for fair damage. In Pharaoh Man's level, instead of entering the first hole, use the R.Coil to jump over it. Go past the desert to find the Balloon Power. This allows you to release balloons that you can jump on.