I'm toying around with eidolon ideas, and one of the ones that keeps rolling around in my head (pun completely intended :3) is Squush. (Eidolon referring to a summoner's primary monster in Pathfinder RPG, by the way)
Think of him like a snorlax, or Link's mount Moosh from Zelda.
He'd be big, and round, and adorable, and mine ^^
He'd also have a very powerful bite attack, and like any canine he'd be able to sniff out other creatures ^_^. I could give him a pounce attack too, because isn't it just beautiful to picture this guy pouncing something? X3