Game Guide
Uno:

Uno

Common Pet Fire Cat

A one-eyed kitty cat. It's not missing an eye, though. So don't ask how it lost it.

Skills

Inferno Gaze

Deal moderate fire damage based on pet's speed to target. On critical hit, gain a random positive status effect. Has a base critical strike chance of 25%.

Pounce

Triggered skill/cannot be used - When this pet gains a positive status effect, 5% + 2% per mastery level chance to pounce at a random target dealing fire damage based on pet's speed.

Attributes

Each pet level grants the following attributes:

Strength 1
Intelligence 3
Speed 6
Vitality 2

Uno Evolutions

Uno can evolve into the following pets:

Dos Dos Evolved Fire Brand of Dos

Note: Evolving Uno requires it to be level 250, both skills to be mastery level 10, applying the evolved pet's brand and then applying an Orb of Evolution to that pet.