Can Drilbur be shiny in Pokémon Go?
If you find a Drilbur 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/24213801/can-drilbur-be-shiny-excadrill]

Drilbur, the mole Pokémon from Unova, can be found in the wild in Pokémon Go. Yes, Drilbur can be shiny in Pokémon Go!

Evolution Excadrill is actually a great ground-type and steel-type attacker. When it’s a shadow Excadrill, it’s even more powerful, but the regular version still is pretty good, only getting outranked by Legendary or Mega Evolved Pokémon.
What is the shiny rate for Drilbur 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. Drilbur 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.