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's Strongest Robot? / One Punch Man - YouTube
Why child emperor robot can work for just 3 minutes : r/OnePunchMan
Do you guys think this robot is drive Knight disguised? | One punch man manga, One punch, One punch man
Genos/#1470155 | One punch man, One punch man anime, One punch man manga
Metal knight, one punch man, robot, mecha HD wallpaper | Pxfuel
One-Punch Man: S-Class Heroes / Characters - TV Tropes
Sticker de Christavalier sur one man gundam christavalier wahl robot cyborg 12 fairy androide opm plagiat tail genos spriggans punch machine icht