As voted by kita mikichi here is the Mega Man Cartoon review for the Vault.

Everyone knows the story of Mega Man by now, well those who've played the games at least; it's about a boy robot called Mega Man, who was created by Dr Light to fight off the evil Robot Masters of Dr Wily alongside his Robot Dog Rush and sister robot Roll. To compare it to another anime it's basically a cooler version of Astroboy.
In the mid 90s, Ruby Spears (The same Ruby Spears that made last entry's Rubik Cube cartoon) licensed the rights to make the Mega Man cartoon in collaboration with a number of Japanese animation studios; it's not uncommon for Japanese companies to lend a hand in animating with American studios and vice-versa; Anime series Big O being the biggest example of American influence on Japanese Anime but that's for another entry.
Now Video Game cartoons don't exactly have the most stellar history, there's a lot to name that failed miserably, and another load which were cheesy nostalgia trips that don't hold up well today with maybe one or two that do still hold up today. Mega Man would be in the latter categories for one reason only. It's the only Video Game cartoon that at least maintains it's identity.
To put this into context the only criticisms I can really give the Mega Man cartoon is Roll's design and the occasional derpy expression from Mega Man. Other than that there's not much else to point out; the rest of the show is insanely accurate to the games, even the opening theme sounds like the games' killer soundtrack.

In fact I've never seen the Mega Man cartoon appear on any worst video game cartoon list.
The problem is, a lot of shows in this genre always have to pass a barrier of abuse from fans who will constantly say it's not like the games. Mega Man actually gets a pass but at the same time it's also one of the more overlooked shows as the likes of Captain N, Sonic & Mario are more popular despite each having their obvious drawbacks. There's a case for taking risks as well and while Mega Man does make a lot of good decisions those decisions are too safe. Sonic's Nightmare world in the SatAM series was a risk that paid off, casting a wrestler to voice Mario paid off, you get the idea, Mega Man is too safe to be well remembered.
My opinion on it?
Well it's decent but I wouldn't say it's that memorable.
Next entry I'll be announcing a special run of reviews, keep watching folks.