just a few from the pet journal, since they were all given some lore under the info box-
Turquoise Turtle: "Turtles are feared by naga, who consider them bad luck and give them a wide berth on the shores of Azshara."
Zooey Snake: "These reptiles posses hooked scales, allowing them to slither up Kun-Lai Summit's rocky sopes (sic) and steep cliffs."
Elfin Rabbit: "Their proximity to the magic of the elves has caused some of them unnatural long life. And in some elfin rabbits... stranger things."
Kirin Tor Familiar: "To prevent apprentices from secretly using the familiar to complete their chores, the archmagi placed the ritual required to summon these creatures across the pages of several spellbooks hidden throughout Dalaran."
Mule Deer: "It's called a mule because of its big ears. Also been known to transport black market bloodthistle over the border to Quel'Thalas."
Mechanopeep: "Used as a training mount for young gnomes, the Mechanopeep has none of the speed but all of the charm of its bigger brothers."
Phoenix Hatchling: "A child of phoenix god Al'ar, the hatchling takes flight immediately after birth."
Black Rat: "While many believe black cats to be a sign of bad luck, black rats are held in higher esteem."
Dark Phoenix Hatchling: "Fire hatchlings are born from the fire of a phoenix. Dark hatchlings emerge from their shadows."
any other good ones?