I just finished Charge Man's stage in MM5. The level itself wasn't as hard as I expected. There were some tougher than average enemies, but no highly irritating obstacles to get by.

Charge Man really messed me up at first. What he does is follow you really quickly to try and damage you by contact. He does cause stuff to fall from the ceiling, but it's no problem to avoid. He's the direct threat. Most of the time he just follows you, but sometimes he charges quickly and you have to jump over him to get out of the way.

He's only vulnerable when he's not charging or causing stuff to fall on you. I used the standard weapon again, charged, as nothing else I had worked on him.

I just noticed that this game seems to be encouraging me to collect letters that spell Megaman 5. I guess there's one or two per level or something. Not sure what you get, if anything, for getting all of them.