What is the rarest shiny in pokemon go?

The rarest shiny Pokemon in Pokemon Go is generally considered to be Shiny Party Hat Pichu. This special version of Pichu has only been available during specific limited-time events, such as Pokemon Go's anniversary celebrations.

Shiny Party Hat Pichu is extremely rare and highly sought after by collectors and players. Its shiny form features a black hat with yellow stars, making it a unique and valuable addition to any Pokemon collection.

Due to its limited availability and rarity, Shiny Party Hat Pichu is considered one of the most difficult shinies to obtain in the game. Players who are lucky enough to encounter one should consider themselves very fortunate.