There are 81 different pets. You can see all pets in the Adoption Center, but there are a few pets that are not adoptable in the normal way.
Here is more information about adopting pets.
There are 33 different minis. You can hatch a mini with an Evolutions Egg in the Evolutions Building, and they can be bought at the Auction House.
What mini will come from what egg can be found by clicking here.
Both pets and minis can be given different kind of colours. To see how a pet or mini will look like in certain colours, click on Pet or Mini in the list below.
Here is a list, sorted alphabetically, with all available pet environments and how to unlock them.