The Unicorn is a Tier 11 Pet obtainable through a Tier 11 Egg.
It can also be bought in the Premium Shop for R$ 499, however its stats will be lower than normal. 100 Coin Collection and 150 Agility. (No longer available in shop.)
Unicorns can be combined to make a golden pet, the Golden Unicorn. It has 4,200 coin collection and agility, making it a trash pet even when combined.
Its rainbow version starts off with 5 times the normal stats with 7000 Coin Collection and 7000 Agility.