Froakie and Rowlet received Halloween costumes as part of 2024 Pokémon Go Halloween event. Both Halloween Froakie and Rowlet can be found shiny.
What's more, these two costumed Pokémon can evolve, unlike many of the other costumed Pokémon that are doomed to remain babies. That said, if you want Meta-relevant Decidueye and Greninja, you'll want their Community Day legacy moves to apply to them (Frenzy Plant and Hydro Cannon, respectively), so you may have to use an Elite TM on them .
What is the shine rate for Halloween Froakie and Rowlet in Pokémon Go?
As part of the Halloween 2024 Part 2 event, any Rowlets and Froakies received through 7km eggs or raids have an increased shine rate, but we don't know what that shine rate is. is. However, the brightness rates for finding them in the wild (they just appear as usual) should follow the standard brightness rate. This means that if you're looking for these shiny guys during Spotlight Hour, they'll still be at the base brightness rate (one in 500).
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.