>>23520629
The list of side games is pretty big, which might even fit 3 volumes.

List of games that came to the West:
>Megaman World I-V, Mega Man & Bass, Mega Man Soccer, Mega Man: The Wily Wars, Mega Man: Battle & Chase, Mega Man: The Power Battle, Mega Man 2: The Power Fighters, Mega Man Xtreme 1&2, Mega Man X: Command Mission, Mega Man Battle Chip Challenge, Mega Man Network Transmission, Mega Man Battle Network 5: Double Team DS, Mega Man Powered Up and Mega Man Maverick Hunter X

And these don't count the games that got fan translation or Meganan X Street Fighter, since that started as a free fan game. And the Game Boy Megaman games are notoriously known to almost have a collection before they got released digitally, and having improved versions made by the community.