Froakie and Rowlet have gotten Halloween costumes as part of the 2024 Pokémon Go Halloween event. Both Halloween Froakie and Rowlet can be found shiny.
What’s more is that both of these costumed Pokémon can actually evolve, unlike quite a few of the other costumed Pokémon that are doomed to stay as babies. That said, if you want meta-relevant Decidueye and Greninja, you’ll want their legacy Community Day moves on them (Frenzy Plant and Hydro Cannon, respectively), so you may need to use an Elite TM on them.
What is the shiny rate for Halloween Froakie and Rowlet in Pokémon Go?
As part of the Halloween 2024 Part 2 event, any Rowlet and Froakies received via 7 km eggs or raids have an increased shiny rate, but we don’t know what that shiny rate is. However, the shiny rates for finding them in the wild (just spawning as usual) should follow the standard shiny rate. This means that if you’re hunting for these shiny fellas during Spotlight Hour, they’ll still have the base shiny rate (one in 500).
What can I do to attract more shiny Pokémon?
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.