You can replace Micro Defender with Pet Bombling http://www.wowhead.com/npc=9656/pet-bombling 2 2 2
(Toxic Smoke Batter Explode) .
Your level pet will get all xp

This strategy worked very well. Thanks, everyone!

Reworked my below strat. Tested over the last week or so. Notes and td script included (I think) Tolerances on this are pretty tight, fail conditions are a couple of crits by Oondasta or him getting off more than 2 of the attacks that I cant currently remember the name of but which damage the back row... looks kinda like a chain lightning effect.

Carry pet: Min health 900 - Max health 1399

Little Tommy Newcomer:27SQ:122CAJ:22181DA:ZL:P:900::6:1399:::N:Start with Darkmoon Zepplin. nnMissile - Oondasta forces swap to Dranei Micro DefendernIf Frill Blast is available use Shield BlastnElse use Batter until Dranei Micro Defender dies and resurrects...n... then Explode. nSwap in Darkmoon ZepplinnIf Frill Blast is available use DecoynElse use Missile until Darkmoon Zepplion dies and ressurects...n... then Explode.

ability(Missile) [round=1]
ability(Explode) [self.aura(Mechanical).exists]
ability(Shield Block) [enemy(Lil' Oondasta).ability(Frill Blast).usable]
ability(Decoy) [enemy(Lil' Oondasta).ability(Frill Blast).usable]
ability(Missile)
ability(Batter)

change(Darkmoon Zeppelin)

My 5th tdScript!

if [enemy(#1).active]
ability(Blinding Poison) [enemy.round=1]
ability(Blinding Poison) [enemy.round=6]
ability(Extra Plating) [enemy.round=2]
ability(Wind-Up)
change(#2) [self(#1).dead]
ability(Reflective Shield) [self.round=1]
ability(Batter) [self.round=2]
ability(Explode) [self.round=3]
endif

This has only been tested once, but it seems to work....
Darkmoon Zepplin 1-2-2, Dranei Micro Defender 2-2-1, lvl1+ carry pet.

Start with Darkmoon Zepplin. Decoy to avoid forced swap and prevents some damage then Missile until Zepplin dies and resurrects then Explode.
Swap in Dranei Micro Defender. Batter until Frill Blast comes off cooldown then Shield Block to prevent the forced swap and block some damage. Resume Battering until Oondasta health is below 560 then explode. Oondasta should die and carry pet gets the XP.

Thnx for the wonderful strategy.However I had to use third carry pet with attack hit power more then 250 as OOndsata survived micro defender explode

I brought a level 15 mechanical carry pet (rocket chicken). Swapped him after scorpid died, the swapped to micro defender and followed the rest of the strat. Worked perfect, he servived and boosted 3 levels. Not too shabby.

Zandalari Kneebiter - Make sure you have Black Claw selected
Lil' Bling - Make sure you have Inflation selected
3rd Pet - any pet with less health than Lil' Bling

Round 1: Black Claw, your pet will die.
Round 2: Lil' Bling comes in, Inflation.

That is all.

(my husband came up with this 2-click strategy)

That was a wonderful strategy! Two hits and done. Thank you.

Darkmoon Zeppelin works well, you can replace Draenei Micro Defender with it. (Decoy, 2x Missile, Explode) Does same thing.

Thank you. I find that this strategy allows you to use a level 1 pet if you want.

I can't replicate that. Darkmoon Zeppelin does too little damage to get Lil' Oondasta to 618 HP before it can explode.
(DMD can sometimes be "too good" tho.)

Sweet :D