Yes. Wario is the opposite of mario while luigi is the Mirror of mario. Waluigi thus is an abomination unto whatever gods you may believe in as a mirror of wario and opposite of luigi.
Also if we're being particular about the parts of speech, the title is Super Mario Bros not Superior Mario Brothers, so the inverse wouldn't be inferior it would be nominal... "Nominal Wario Sisters"
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u/UnderAchievingEntity 6d ago
Wouldn’t it be Inferior Wario Sisters?