Tier list

Ultra Rare, Legendary and Mythic Shinies (from least to most rare) do not show up in common respawns or in Wildscape: they only appear naturally in the Primal Areas that have that species. Shiny bonuses do not change this rule: they only count inside a valid Primal Area. The tier says how rare that Shiny is in PokeAlliance, not that the species is legendary: Shiny Gengar is Legendary and Shiny Dragonite is Mythic. The in-game Hunt Finder lists 39 Primal hunts, all for level 350 to 600: 18 for Ultra Rare Shinies, 18 for Legendary and 3 for Mythic (Dragonite, Slaking and Tyranitar).

Condition:

The species has to be in that Primal Area.

Not found in:

common respawnsWildscape

The Max Brokes figure next to a tier is the reference broke count for catching a shiny of that tier: the more Balls you have thrown at it, the easier it is to catch, but reaching that figure does not guarantee the catch. It only applies to shinies; regular Pokémon have no Max Brokes. In the game you see your brokes on each species in Ctrl+T → Pokémon Brokes.

Each Mega has its own tier, often not the one of its normal form: Mega Pidgeot, Mega Gengar and Mega Scizor are Mythic, and Mega Aerodactyl, Mega Steelix and Mega Houndoom are Legendary. Mega Blastoise, Mega Charizard X, Mega Charizard Y and Mega Abomasnow have no tier.