Acidic Goo

Pet Battle: [20-22] Howling Fjord

Drop: World Drop

Creature: Oozes, Slimes and Worms

Approximate Drop Rate: [Oozing Bag] 1 in 25

Approximate Drop Rate: [Disgusting Oozeling] in bag 1 in 85

Overall Approximate Drop Rate: 1 in 2,125

Pet Battle: [12-13] Eastern Plaguelands

Pet Battle: [11-12] The Hinterlands

Drop: Ji-Kun [??+]

Zone: Throne of Thunder

Approximate Drop Rate: 1 in 1000

Pet Battle: [23-25] Krasarang Wilds

Pet Battle: [3-6] Ghostlands

Drop: Primordius [??+]

Zone: Throne of Thunder (LFR)

Approximate Drop Rate: unknown

Pet Battle: [1-2] Tirisfal Glades; [1-2] Dun Morogh; [1-2] Undercity; [3-6] Ghostlands; [4-6] Ashenvale; [6-7] Hillsbrad Foothills; [11-12] The Hinterlands; [20-22] Howling Fjord

World Drop: Eastern Plaguelands (requires Fiona's Lucky Charm) [40-45]

Contained In: [Hidden Stash]

Pet Battle: [20-22] Borean Tundra

Pet Battle: [24-25] Dread Wastes

Pet Battle: [4-6] Ashenvale

World Event: Children's Week

Quest: A Warden of the Alliance/Horde [10]

Pet Battle: [3-6] Darkshore

Pet Battle: [23-25] The Jade Forest

Drop: Hydross the Unstable [??+]

Zone: Serpentshrine Cavern

Approximate Drop Rate: unknown

World Event: Love is in the Air

Dropped By: Apothecary Hummel [87+]

Zone: Shadowfang Keep

Drop Rate: 1 in 65 dropped (available 14 days per year)