The Pet Pavilion also contains shops. The Pet Shoppe Boys sell a variety of pets and pet eggs in one shop! You can still find many pets in shops throughout the Spiral, however pets will no longer be sold at the Bazaar.
Your favorite pets can still be found on the bosses of the Spiral, but many new pets are available from creatures throughout the Worlds. Pets that drop as rewards will come in the form of an egg that will have to hatch over time.