>>36668919It's not objectively correct because of the reasons stated in
>>36668585. But for additional clarification,
>Cosmog family and Necrozma aren't Ultra Beasts 1) Do not have Beast Boost as an Ability.
2) Are unaffected by the Beast Ball's multiplier that only works for Ultra Beasts.
3) Are not stated as Ultra Beasts in any official media or by The Pokemon Company International; at best, we have characters in the games and anime who *think* these Pokemon are Ultra Beasts, but they were clueless at the time. The word of god here is TPC, and TPC says Cosmog and co. and Necrozma are not Ultra Beasts, but UB-like entities.
>Ultra Beasts aren't Legendary. Yes, the Ultra Beasts are categorized as "sub-legendary Pokemon" in the games' coding, the same classification used for established Legendary Pokemon such as lake trio, legendary birds, etc. But The Pokemon Company has flat-out retconned this by stating that Ultra Beasts are not Legendary Pokemon on the official websites. One of the quiz questions actually listed out Pheromosa as one of the choices, and the actual answer to that question was a Legendary Pokemon. (Meaning Pheromosa and by extension all UBs are not Legendary Pokemon.)
3) Mythicals aren't Legendary.
These categories were always separate in the Japanese version, assigned completely different names since Gen I. Unfortunately, Pokemon was improperly translated by the likes of Nintendo of America and 4Kids, who assumed Mythicals are Legendary Pokemon, hence the generation of Pokemon players who assume Mythicals are "event Legendaries." In Gen V, The Pokemon Company International finally corrected this mistake and properly separated the two groups. Legendaries are Legendaries. Mythicals are what people originally assumed were "event Legendaries." This is coming from the official Pokemon company. Pokemon fans already use the official terminology in most other aspects, so why can't people use the terminology for Mythicals?