Note : This is an “edit” image but this defense is possible in the future by whales.
The defense is Bubbles - Snowball - Clever - Snowball - Bubbles what the same troops and formation as in the image.
Snowball isn’t released for now but he will be release soon in few next Mighty Pet event.
Here are useful informations
Bubbles - 5* Ice / Blue from Mighty Pets
Snowball - 5* Nature / Green from Mighty Pets
From the Wrath of Pets passive, whenever your hero get a fiend, each Mighty Pet hero in the defense team will do 85% damage to all you hero. (This effect can activate only once per turn.)
If the Clever tank (who is fast mana speed) fire, your each hero will get 100% + 85% x 4 = 440% damage !!! in fast mana speed.
To put this in perspective, 440% damage is like “being hit by Goseck special skills with 74.3% remain hp”. However, it is the damage from passive. So, it bypass taunt and any types of dodge .
And even you manage to kill the Clever tank with heavy blue stack and board luck, you still have a problem against double green flank. Snowball is x3-hit fiend summoner. I think his mana speed is average. If you get a fiend, your each hero will get 85% x 4 = 340% damage which is like “being hit by Killhare costume with +10% Atk from her family bonus”. It also bypass taunt and any types of dodge.
The troops on each Mighty Pet hero in the defense team are ninja troop to maximize damage from passive. And both wing are Bubbles because she has highest base attack in the Mighty Pet family.
I know you can beat this defense or any defense with very good board luck but that isn’t the point. My point is what are the team do you use if you have to attack this defense ?