This never-ending army of cannon-fodder debuted in Super Smash Bros. Brawl, being the main enemies of that game’s Multi-Man modes. They’re clearly made of metal (as the name suggests), but their exact origins are a mystery. Despite being artificial, though, they all have clear purposes and personalities: Red ones lead, Blue ones provide power, Greens are great team players, and Yellows... Yellows are also there.