Using the Switch version, played all four games, finished each one. Got 90.5% of the challenges (A Rank) on Mega Man 10, and I intend to complete 100% of the challenges on Mega Man 9 someday, but Mr. Perfect is making that difficult to achieve. I will not be returning to the extra challenges for any of the four games—they are fine for bonus content's sake, but ultimately not worth the effort.

Also, while the omission of Mega Man & Bass (8.5, if you will) was initially disappointing, I'm coming to find that the game is not very good, so no big loss there, I guess.