Can Wooper be shiny in Pokémon Go?
If you find a Wooper in the Pokémon Go wilds, does it have any chance to be shiny?
This article references relevant content from the polygon.com website. Original article link: [https://www.polygon.com/pokemon-go-guide/23859703/can-wooper-be-shiny-quagsire]

Wooper, the water fish Pokémon from Johto, can be found in the wild in Pokémon Go. Yes, Wooper can be shiny in Pokémon Go!

Note that this is regular Johtoan Wooper, not its poisonous Paldean counterpart. Paldean Wooper and Clodsire will likely come to Pokémon Go soon, as other Paldean Pokémon have been getting added, but for now we’ll have to settle with these pink cuties.
What is the shiny rate for Wooper in Pokémon Go?
As per old research by the now-defunct website The Silph Road (via Wayback Machine), the shiny rate for Pokémon on a regular day is approximately one in 500. Wooper is not a confirmed Pokémon that gets a “permaboost” (meaning that it’s a rare spawn and thus gets a boosted shiny rate).
Not much, unfortunately. It appears to be random chance. Shiny Pokémon catch rates are set by developer Niantic, and they are typically only boosted during special events like Community Days or Safari Zones, or in Legendary Raids. There are no consumable items that boost shiny Pokémon rates.
LeekDuck keeps a list of currently available shiny Pokémon. It’s a helpful visual guide that illustrates what all of the existing shiny Pokémon look like.
For more tips, check out Polygon’s Pokémon Go guides.