One Pokemon Go event has left a lot of players fuming due to a Shiny mistake, which made their effort felt like a waste.

Pokemon GO trainers recently experienced an in-game issue affecting the latest Catch Mastery event, and Niantic may be offering compensation.

Niantic botched Pokémon Go's Catch Mastery event, failing to boost Shiny rates for Omanyte and Kabuto. Now, fans are outraged after wasted efforts.