"Mario’s appearance comes partly from the hardware limitations around the time he was created. His sprite wasn’t large enough to fit in a mouth so he got a moustache instead, his distinctive hat was added because it was too difficult to animate hair, and his overalls allowed for his arms to be animated clearer due to them being a different colour to the rest of his body." Si j'ai bien compris c'est pour pouvoir distinguer l'animation des bras, et le reste effectivement c'est de la limitation hardware(moustache au lieu de bouche, casquette au lieu de cheveux, et je crois que les couleurs aussi ont été choisi pour palier aux limitations hard')

Voir ce tas de pixel me fait kiffer ^^