Mega Man is another character who’s had an interesting history as a Figure Player. In other words, he was arguably the worst FP in Super Smash Bros. 4. His AI just couldn’t do anything properly. It would use projectiles at close range, couldn’t camp, and couldn’t easily KO. Mega Man still struggles with a lot of the same issues in Super Smash Bros. Ultimate, but the good news is he’s no longer the worst in the game. Bayonetta (or Sheik or Pichu, depending on who you ask) says hello.
A complete summary of Mega Man’s performance in Super Smash Bros. 4 can be found on the character’s information page. It includes strengths and weaknesses, AI quirks, and an archive of tournament representation and results.