Could this possibly mean the return of the villain as robot? : r/OnePunchMan
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Robots | One-Punch Man Wiki | Fandom
someone has probably noticed this before but the I still got to point out that these robots that zombi man fought in the monster association look like Metal Knight [chapter 100&101] :
Metal knight. OnePunch - Man | One punch man, Saitama, Herói
The Keepsake of [Transform]... - One Punch Man: The Strongest | Facebook
Metal Knight - One-Punch Man: A Hero Nobody Knows Guide - IGN
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Metal Knight's Strongest Robot? / One Punch Man - YouTube
Pin by miyako 悪 on hq e mangá | One punch man manga, One punch, One punch man
One punch man genos, blast, cyborg, metal, orange, red, robot, HD phone wallpaper | Peakpx