>>715637746Chronologically speaking everything is one continuity from MM1 to ZX, so it's a bit of a loaded question. When you say "spin-offs", do you mean something that isn't part of the main continuity, or something that isn't part of the 11 games working off of the original series?
The only spinoffs that come to mind are the Battle Network/Star Force games, and very specifically The Misadventures of Tron Bonne since that was a spinoff of the Legends games (which have a point in the series continuity). You could maybe include some of the handheld entries as well, but those are stuff that can either be dubiously placed in the continuity or at a point (Mega Man & Bass) where continuity doesn't matter.