Can Chinchou be shiny in Pokémon Go?
If you find a Chinchou 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/23948692/can-chinchou-be-shiny-lanturn]

Chinchou, the angler Pokémon from Johto, can be found in the wild in Pokémon Go. Yes, Chinchou can be shiny in Pokémon Go!

If you’re wondering if Chinchou or Lanturn are relevant to the Pokémon Go meta, Lanturn actually has lots of uses in the PvP Great League, thanks to its defensive stats and arsenal of fast moves. You can see more info about its movesets and the reasoning on GamePress’ Lanturn breakdown.
What is the shiny rate for Chinchou 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. Chinchou 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.