I don't have any problems with using legendaries. They're still Pokemon, so I don't view using one as "cheating" or "unfair". In fact, legendary =/= broken and/or overpowered. Sure, there are ones that are flat-out OP like Xerneas, Mewtwo, Arceus, and Primal Groudon (and don't get me started on Mega Rayquaza), but others like Articuno, Mesprit, and the Regis are usually not really used much in competitive battles. Also, whether anyone believes Phione to be considered a legendary or not, it is generally agreed that Phione is massively underwhelming. So why is it, instead of powerful Pokemon like Aegislash and Garchomp, banned from battle facilities?