3 star pet location : 3 star animals most often appear around the forest I saw it several times. To catch 3 star animals you need to use good quality berries. You can Buy gourmet berries for 4750. Don’t use berries that are of poor quality.
I used 3 gourmet berries to catch 3 star animals.
Hard to find 3-star pet
If you have never met a 3 star animal. You can release the animal you want to catch and wait a few minutes for the animal to respawn again. If you are lucky 3 star animals will reappear