And speaking of Meloetta...I just found out (because I don't really keep track of these things) that both of its Formes got renamed in the English versions of the games, for some reason? I always get told that the terms used in this franchise get changed to make them easier for English speaking kids to remember, but things like changing "Step" into "Pirouette" tell me that, in reality, they're just changing things for the sake of changing things.
Though I agree that TPCi has a habit of changing names for no good reason (e.g. Pokéshifter to Poké Transfer, Free Fall to Sky Drop, Psycho Shock to Psyshock, etc.), it seems that they thought that "Voice" and "Step" sounded too basic and thus opted to call those Formes "Aria" and "Pirouette" instead. Similar to how NoA renamed the Kanto and Johto Gym Badges, such as "Blue Badge" to "Cascade Badge" and "Wing Badge" to "Zephyr Badge."