Screech

Pet Battle: [15-16] Un'Goro Crater; [22-23] Mount Hyjal

Pet Battle: [1-2] Undercity; [1-2] Tirisfal Glades; [3-6] Silverpine Forest; [12-13] Eastern Plaguelands; [22-23] Mount Hyjal

Drop: World Drop

Zone: Hillsbrad Foothills [20-25]

Approximate Drop Rate: 1 in 8,000

Vendor: Donni Anthania

Zone: Elwynn Forest

Cost: 40 (unlimited supply)

Pet Battle: [23-25] The Jade Forest

Vendor: Breanni

Zone: Dalaran

Cost: 50 (unlimited supply)

Pet Battle: [1-2] Elwynn Forest; [1-2] Eversong Woods; [1-3] Silvermoon City; [7-8] Arathi Highlands; [20-21] Netherstorm

Pet Store 

Pet Battle: [3-4] Northern Barrens; [9-10] Southern Barrens

Pet Battle: [18-20] Blade's Edge Mountains

Vendor: Donni Anthania

Zone: Elwynn Forest

Cost: 40 (unlimited supply)

Pet Battle: [24-25] Townlong Steppes; [24-25] Dread Wastes

World Event: Darkmoon Faire (first week of each month)

Vendor: Lhara

Zone: Darkmoon Island

Cost: 90 (unlimited supply)

Drop: Darkmoon Game Prize

Zone: Darkmoon Island

Approximate Drop Rate: unknown

World Event: Darkmoon Faire (first week of each month)

Vendor: Lhara

Zone: Darkmoon Island

Cost: 90 (unlimited supply)

Drop: Darkmoon Game Prize

Zone: Darkmoon Island

Approximate Drop Rate: unknown

Drop: Dart's Nest

Zone: Dustwallow Marsh [35-40]

Drop Rate: 1 in 1

Drop: Deviate Guardian, Deviate Ravager

Zone: Wailing Caverns [17-20]

Approximate Drop Rate: 1 in 1,000

Pet Battle: [15-16] Un'Goro Crater

Vendor: Freka Bloodaxe

Zone: Icecrown

Cost: 40 (unlimited supply)

Pet Battle: [24-25] Vale of Eternal Blossoms

Pet Battle: [24-25] Vale of Eternal Blossoms

Pet Battle: [24-25] Townlong Steppes

Drop: Gundrak Raptor

Zone: Zul'Drak [73-77]

Approximate Drop Rate: 1 in 1,000

Trading Card Game: Heroes of Azeroth

Pet Battle: [23-24] Uldum

Pet Battle: [24-25] Townlong Steppes