Cherrim forms in Pokemon GO was just introduced this past week when Ninatic Labs revealed the latest additions.
That would include Cherrim.
Cherrim Forms Pokemon GO
Cherrim has two forms in Pokemon GO: Sunny and Overcast. If you evolve Cherubi into Cherrim with sunny weather, it will turn into the Sunny version. If you evolve Cherubi in cloudy weather, it will turn into the Overcast version. Unlike the Eevee evolutions, these are not two different type of Pokemon and don't count as such in the PokeDex.
Niantic Labs made the announcement on Twitter. "We hope you’ll enjoy the fun and surprises as you encounter these Pokémon in the wild and hatch them from Eggs. Also arriving in Pokémon GO is a powerful Ground-type move—Earth Power!"
Photo courtesy of Niantic Labs