Pet is a good partner when you're in a fierce battle. A good pet can be used in various ways to assist you.
Ways to find pets:
First of all, you'll receive a Sunflower when you're doing the tutorial. Simply follow the tutorial and newbie quest, you'll be able to get the pet.
Pet Eggs are sold in the mall. You can buy pet egg and pet egg gift box to get random unbound pet. One pet egg contains one pet while one pet egg gift box contains 10 pet eggs.
The most useful way to obtain pets is from the Defense Against the Tailed Beast event, which starts at 8PM every Tuesday, Thursday and Saturday. You can get pets by: 1. Defeat tailed beasts for low quality pets; 2. Redeem pets with feathers. Note: feather can be obtained from honor ranking.