The Three Little Pigs are 
-Support Heroes who shield and harmonize their allies on the battlefield.
“Who’s afraid of the Big Bad Wolf?”
Entrance: In a straight line, Fifer plays the flute, Fiddler plays the fiddle and Practical follows up front towards the battlefield. Afterwards, they gather together as a single battle position.
Victory: As seen below.
Defeat: Perhaps getting blown away from a strong wind. They try to grab onto each other, but it failed.
Basic Attack: Perhaps throwing bricks to enemies.
White Skill: The Three Little Pigs build a brick wall in front of their allies for X HP and block critical attacks. This will not be effective against enemies above level X.
Green Skill: At the start of each wave, the Three Little Pigs altogether do a small dance that increases theirs and their allies’ speed for X seconds. Fifer will also play a small medley with his flute that heals X HP to the weakest ally. Fifer can only do this once per wave.
Blue Skill: Like Nick’s Shuriken Pop skill, all three pigs will each throw a brick at their enemies, and stun them for X seconds. A brick-ache, I call.
Purple Skill: The Three Little Pigs gain X armor when half of their HP is gone.
As requested by @Queen_Kate, here is the the Three Little Pigs’ Skill List. As always, constructive feedback or changes is available. Thank you. 
