Trainer Pig

A Trainer Pig (known in social media as a Crossfit Pig) is a type of pig that can turn regular pigs into Muscle Pigs, increasing the difficulty of the level.

Strategy
He appears in the Pigs On The Block levels, in which he automatically turns all pigs in the level into Muscle Pigs, making them square and hard to roll. He is hard to defeat, but launching good and explosive birds will defeat him.

Trivia

 * Trainer Pigs have a tattoo of a heart with Gale written on it; this may imply they have romantic relations for her.