ALRIGHT, just for the public in the background so no confusions occur anymore, we have:
>Mythicals
Pokemon like Mew, Celebi, Jirachi and the like
>Legends
Who could be split into Box Art Legends (like Lugia, Palki, Zekrom and th like) and Sub-Legends (mons like the Bird trio, Swords of Justice, Golem trio, etc)
>UB's
Who TECHNICALLY are still lumped with Sub-Legends, but for all intents and purposes, now we can consider them a separate group. Not non Legendary mons, just a separate group. We can't just ignore the game's coding. So we're just gonna go with the "they're not Legends in there world, but are in ours" excuse.
So to recap, we have:
>Mythical
>Legends (Box Art and Sub)
>UB's
Everyone's agrees? Good. Now let's move on.