Robots: WoW Battle Pets

Vendor: Draemus

Zone: Dalaran (Broken Isles)

Cost: 200 (unlimited supply)

Profession: Draenor Archaeology - Arakkoa

Artifact: [Ancient Nest Guardian]

Vendor: World Vendors

Cost: 50 (unlimited supply)

World Event: Feast of Winter Veil

Quest: You're a Mean One...(Alliance)/(Horde)

Approximate Drop Rate: 1 in 65 from [Stolen Present]

Vendor: Quackenbush

Zone: Stormwind City

Faction: Brawler's Guild - Rank 3

Cost: 500 (unlimited supply)

Vendor: Paul North

Zone: Orgrimmar

Faction: Brawler's Guild - Rank 3

Cost: 500 (unlimited supply)

Profession: Archaeology - Dwarf

Artifact: [Clockwork Gnome]

World Event: Feast of Winter Veil

Quest: You're a Mean One...(Alliance)/(Horde) [30]

Approximate Drop Rate: 1 in 65 dropped from [Stolen Present]

Drop: Shadow-Lord Iskar [??+]

Zone: Hellfire Citadel

Approximate Drop Rate: Unknown

Vendor: Vinidcator Nuurem

Zone: Stormshield

Faction: Council of Exarchs - Revered

Cost: 1000 2000 (unlimited supply)

Vendor: Marcus "Bagman" Brown

Zone: Westfall

Cost: 1 (unlimited supply)

Promotion: Support a Streamer on Twitch

Vendor: Gill the Drill

Zone: Thaldraszus

Cost: 2750 (unlimited supply)

Drop: Box of Collapsed Reality

Approximate Drop Rate: Unknown

Drop: Blingtron 6000 Gift Package

Approximate Drop Rate: Unknown

Trading Card Game: Worldbreaker

Drop: Blingtron Gift Package

Approximate Drop Rate: 1 in 200

Drop: Blingtron 5000 Gift Package

Approximate Drop Rate: 1 in 200

Profession: Engineering [205]

Taught By: [Schematic: Lil' Smoky]

Pet Store 

Pet Battle: [25] Mechagon

Drop: The Curator [??+]

Zone: Karazhan

Approximate Drop Rate: 1 in 20

Drop: HK-8 Aerial Oppression Unit [??+]

Zone: Operation: Mechagon

Approximate Drop Rate: Unknown

Profession: Junkyard Tinkering

Taught By: [Blueprint: Microbot XD]

Zone: Mechagon

Achievement: Pet Battle Challenge: Gnomeregan

Category: Pet Battles

Promotion: StarCraft II: Wings of Liberty Collector's Edition

Profession: Cataclysm Engineering [25]

Taught By: Goblin Engineering Trainers

Drop: Void Reaver [??+]

Zone: Tempest Keep

Approximate Drop Rate: 1 in 13

Profession: Pandaria Engineering [75]

Taught By: [Schematic: Chief Engineer Jard's Journal]

Drop: Assembly of Iron [??+]

Zone: Ulduar

Approximate Drop Rate: Unknown

Drop: Blingtron 5000 Gift Package

Approximate Drop Rate: 1 in 200

Drop: Blingtron 4000 Gift Package

Approximate Drop Rate: 1 in 2,000

Drop: Dark Animus [??+]

Zone: Throne of Thunder

Approximate Drop Rate: 1 in 91

Drop: The Kleptoboss [50]

Zone: Mechagon

Approximate Drop Rate: Unknown

Drop: Brutallus [??+]

Zone: Sunwell Plateau

Approximate Drop Rate: 1 in 20

Drop: Haywire Sunreaver Construct [35+]

Zone: Isle of Thunder

Approximate Drop Rate: 1 in 5

Pet Battle: [3-4] Westfall

Drop: Magmatron [??+]

Zone: Blackwing Descent

Approximate Drop Rate: Unknown

Promotion: Recruit-A-Friend

Promotion: Mountain Dew Promotion (Summer 2009)

Vendor: World Vendors

Cost: 50 (unlimited supply)