Dragonkin Battler of Eastern Kingdoms

For this one, Kalimdor & Northrend i only used 3 pets:

Nexus Whelpling (1,2,2)
Stormborne Whelpling (1,2,2)
Stormie (1,2,2)

I always started with Arcane Storm and made sure i kept it up whenever i could
Then i just spammed Mana Surge between the cooldown.

Switch between the pets to always hit enemy with Mana Surge.

You can of course use Tail Sweep to finish the pet if its Low. Thats up to you.

NB! Always make sure your pets have full health and all 3 are alive before entering battle or you wont get credit towards the achivement.

Happy battling!

The NPC's for the Family Battler of Eastern Kingdoms achievement can be found in the following locations from the north to south:
It doesn't seem that besides going up to level 25 there are any changes to the pets. Zunta still uses two pets which are both common in rarity when engaged with a full level 25 team.

Notes:
The battles are daily, this means that to complete the meta you will need to revisit the trainers for a total of 10 days.
And to avoid anything not completing it seem it is best to complete these on an alliance character.

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• Deiza Plaguehorn in Eastern Plaguelands. Her pets are Beast - Beast - Undead.
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• David Kosse in The Hinterlands. His pets are Beast - Magic - Critter.
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• Kortas Darkhammer in Searing Gorge. His 3 pets are Dragonkins.
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• Durin Darkhammer in Burning Steppes. His pets are Flying - Critter - Elemental.
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• Lindsay in Redridge Mountains. She uses 3 Critter pets.
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• Everessa in Swamp of Sorrows. Her pets are Beast - Aquatic - Flying.
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• Lydia Accoste in Deadwind Pass next to Karazhan tower. Her pets are Undead - Elemental - Undead.
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• Julia Stevens in Elwynn Forest. She seems to be using 2 Beast pets.
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• Old MacDonald in Westfall. His pets are Flying - Mechanical - Critter.
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• Eric Davidson in Duskwood. He uses 3 Beast pets.
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• Steven Lisbane in Northern Stranglethorn Vale. His pets are Magic -Beast - Beast.
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• Bill Buckler in The Cape of Stranglethorn. His pets are Humanoid - Flying - Flying.
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Quick list for Paste/Tomtom:

/way #23 67.0 52.4 Deiza Plaguehorn
/way #26 62.8 54.6 David Kosse
/way #32 35.6 27.8 Kortas Darkhammer
/way #36 25.6 47.6 Durin Darkhammer
/way #49 33.2 52.6 Lindsay
/way #51 76.6 41.6 Everessa
/way #42 40.2 76.6 Lydia Accoste
/way #37 41.6 83.6 Julia Stevens
/way #52 60.8 18.6 Old MacDonald
/way #47 20.2 44.2 Eric Davidson
/way #50 46.0 40.6 Steven Lisbane
/way #210 51.6 73.4 Bill Buckler


As you might have noticed, as of Patch 12.0.0, you can only challenge the Pet Battles Trainers in Kalimdor, Eastern Kingdoms and Northrend once per day.

Which means that for the new meta achievements being introduced with Midnight's Pre Patch, it will take a minimum of 10 days to complete (one day per pet family).