wario has a W on his hat and his name is mario starting with a /w/ sound. waluigi has a gamma Γ on his hat, so his name is pronounced like luigi starting with a /g/ sound. now if we take the pronunciation [luˈiːdʒi], replace the [l] with a [g] and hypercorrect for a florentine accent, we get [ˈɡuttʃi], which is the pronunciation of famous fashion design brand from Florence, Gucci
Guccio Gucci is an undercover alias for Waluigi
also apparently the Gucci brand's founder really is called Guccio Gucci, like we're in some anime or something
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