I enjoyed using Ness far more, his PK fire and thunder were better than Lucas' and I could never get PK Freeze to land.
Mega Man is actually one of the biggest reasons why I'm hyped for the new SSB, I'm actually a bit intrigued that they chose to use a superdeformed version of his NES sprite model as his character (as opposed to what his character actually looks like in later MM games and the original Marvel vs. Capcom). To my knowledge, he's the only SSB character besides Mr. Game and Watch to be like this.