The leader boards show that NO ONE has officially done this.. The only way they would have the achievement is glitched.. Look at the xbox360achievement.org games of the year and achievements of the year if you want to know more.
If you attempt this, never continue the challenge if you get by anything! Even if it does no damage, quit the level and start again.
When I did my first attempt, the only thing that hit me was the earthquake that commando man can hit you with, but it does no damage. I read the achievement and thought that technically it did no damage and so would meet the achievement. I completed the rest and didn't get the achievement. Moral of story: Don't risk it, if ANYTHING hits you damage or not, restart level.
But the good news is, the practice in that attempt made me so good at Megaman 10 that I was able to redo and complete the achievement this afternoon in one 3 hour session (Wily level 4 took a few retries still).