Pet is an animal that has been caught. Pet is very important, in addition to making roads, pets can increase income from playing (fetch range and hide and seek).
1 star pets are very easy to find and easy to catch while 3 and 4 stars pet are rare / hard to find and hard to catch.
How to catch a 3 star pet without buy ruby and gold rescue
To catch a 3-star pet you need a fairly expensive berry (purple berry) so provide 10,000 to buy berries.
Go to the forest to catch animal.
Then if only 2 star pets are found, catch and release the pet by pressing exit in the top right menu (see image below). Wait for the pet to reappear (respawn) for about 2 minutes. Repeat until the pet Appears.