DzNutsKong
2010
I don't think it's as good as Mega Man 9 but it's not big enough of a difference for me to care. It technically is even more polished but the level design is worse and a handful of the boss fights suck. They focused on making the weapons just fun to use instead of making them all practical and I think it worked out wonderfully. Also has an endless mode that you could argue is better than 9's.
2018
Your more modern Mega Man game. The shop is especially broken in this one and it's a bit short but that's about it. The stages all were really fun and the bosses and minibosses were pretty good too for the most part. The Double Gear system is a great way to get people acquainted with the more difficult gameplay while also not being super intrusive for people who don't use it.
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2017