Grenn's farm
Farmer Grenn's.
The sour apple berries in Grenn's Farm (Pet Pet Park game) are beside Ashley and her flock of sheep. They are in a tree and they look like strawberries, but with brown and pink stripes. See the related link for the website.
Apples are in the Pawvillion.
Grenn's farm
Mystimar Glen
in the munchery
at the Founder Cemetry
Melee is at Grenn's Farm
in the cyodrake temple garden
She's in the farm at the top corner.
the golden bushes in PetPet Plazza by the mall
Yes petpetpark is free