Of course, no raid battle is an easy feat, especially when Virizion is concerned. The team at Niantic suggests using Fire, Ice, Poision, Flying, Psychic, and Fairy-type attacks against this particular species. Flying-type Pokémon are also effective against Virizion.

With only a one in 20 chance for Shiny Pokémon to appear in Raids, you’ll want to make the most out of Virizion’s raid battle event while you can.

Virizion raid battles in Pokémon GO take place from Dec. 1 to Dec. 8.

Source: https://www.distractify.com/p/can-virizion-be-shiny-pokemon-go