I can't go anywhere in game without seeing things like that lil guy that I'd love to have as an in-game pet :>
Personally, though, if I could pick one creature I wish they'd add as a pet in game, I'd want a sugar glider.. when flying on your flying mount, it could open it's flaps and glide alongside..
for abilities, it could have basic ones like claw and bite.. then special ones like facehug (that maybe does damage and blinds them for a turn) and crab (a loud, piercing cry that frightens the enemy pet) lol..
Siusy ~ Resto Shammy, LWer, Engineer & Fluff Collector
Proud Suggie Mommy of Lilo & Stitch