Murkrow, Johto's Dark Pokémon, can be found in the wild in Pokémon Go. Yes, Murkrow can shine in Pokémon Go!
Honestly, Honchkrow isn't a terrible option for both a dark-type attacker and a flying-type attacker, if you don't have better options. He's even better with his shadow form, where he's strangely reliable. After all, these witch birds have some use besides being super shiny!
What is Murkrow's shine rate in Pokémon Go?
According to old research by the now-defunct website The Silph Road (via Wayback Machine), the shine rate of Pokémon on a typical day is about one in 500. Murkrow is not a confirmed Pokémon to get a “permanent boost.” ” (meaning it is a rare spawn and therefore gets an improved shine rate).
What can I do to attract more shiny Pokémon?
Unfortunately, not much. It seems to be a coincidence. Shiny Pokémon catch rates are set by developer Niantic and usually only increase during special events like Community Days or Safari Zones, or in legendary raids. There are no consumable items that increase Shiny Pokémon rates.