Not counting MMZ Collection, isn't it also the LAST Mega Man game?
Technically, there are those horrid ZX games (which I didn't include in the rankings, but would easily fall below the Classic series).
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http://www.youtube.com/watch?v=SBpfwpOPXNc&NR=1&feature=fvwp
I watch Planet Chasers Starlight Excellent all day, every day.