Pet Bombling

Pet Bombling:
1x Big Iron Bomb
1x Heart of Fire
1x Fused Wiring
6x Mithril Bar

Raw Materials:
3x Iron Bars
3x Heavy Blasting Powder [or 3x Heavy Stone]
1x Silver Bar [or 1x Silver Contact]
6x Copper Bar [or 3x Delicate Copper Wire]
2x Essence of Fire
1x Heart of Fire
6x Mithril Bar

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Lil' Smoky:
1x Core of Earth
2x Gyrochronatom
1x Fused Wiring
2x Mithril Bar
1x Truesilver Bar

Raw Materials:
1x Core of Earth
2x Iron Bars
1x Gold Bar [or 2xGold Power Core]
6x Copper Bar [or 3x Delicate Copper Wire]
2x Essence of Fire
2x Mithril Bar
1x Truesilver Bar

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BOTH, In Raw Materials:
5x Iron Bars
3x Heavy Blasting Powder [or 3x Heavy Stone]
1x Silver Bar [or 1x Silver Contact]
6x Copper Bar [or 3x Delicate Copper Wire]
2x Essence of Fire
1x Heart of Fire
8x Mithril Bar
1x Core of Earth
2x Iron Bars
1x Gold Bar [or 2xGold Power Core]
1x Truesilver Bar

Where Bar's can also be replaced by Ore

I just picked this up off of Thermaplugg and the "lil'Smokey" off a trash mob after opening the door to the final chamber. Neither one mentioned anything about goblin or gnomish engineering required. So as a Gobline Eng, I still learned Lil'Smokey also.

Have fun, and thanks patch 3.1

As of 3.1 it can be obtained at 100% Drop chance off of Mekgineer Thermaplugg.