I've quickly come up with some below, let me know what you think and post your own ideas:
Pet Name Description Bear Roar All targets stats reduced by 3% for 30 seconds. 2 minute cooldown Crab Grab Both Target and Pet are rooted for 2 seconds. 5 minute cooldown. Spider Envenom Increases poison/sting effects against the target by 10% for 20 seconds. 2 minute cooldown. Crocolisk Crush The target's movement speed is reduced by 20% for 10 seconds. 5 Minute cooldown. Sporebat Cloud The pet emits a spore cloud, damaging all enemies within melee range. The cloud will persist even if the pet moves away. Lasts 20 seconds. 3 Minute cooldown. Hyena Rabies The target becomes rabid and cannot switch targets. Lasts 5 Seconds. 1 minute cooldown Tallstrider Peck The target's chance to miss is increased by 5% for 5 Seconds. 10 second cooldown. Nether RaySmother The target cannot generate any health or mana for 30 seconds. 5 Minute cooldown.
Post yours!