I mean, the similitudes are obvious. Smile-man is based on the mexican character "El chapulin Colorado" created by Chespirito (Roberto Gómez Bolaños). His character was a parody of the genre of superheroes who used to make mistakes and be injured by accident.
I just wonder if ONE is actually a real fan of Chespirito work or someone told him to include this parody in his manga. Does anyone have a source or theory on the subject? I would like to read it.
Also, I like that smile-man is having more time on screen in the second season.