Console commands for some extra pets. There are three bonus pets that I know. Open the console and type in the following.

Cosmic dog - gives you Comet:
Adds 1 might to the player character and the party gains bonus deflection against enemy weapon attacks.

Cosmic bird - gives you Orbit:
Adds 1 perception to the player character and makes the party move faster.

Cosmic cat - gives you Luna:
Adds 1 dexterity to the player character and gives the party a chance for enemy weapon attacks to graze.

Note: These console commands do not disable achievements.