Mighty Hoax is the second episode of Angry Birds, which contains two themes with 21 levels each. Much like its preceding episode, it takes place once again in the vast plains but is arguably the most challenging episode in the game. In the cutscenes, the pigs try again by stealing the bird's eggs, replacing them with cardboard cutouts, and using King Pig and a Bush cardboard decoys to get away.
In the Trilogy Version, the opening cutscene shows the pigs not hiding in a cardboard cut out. In the ending cutscene, Bomb is sitting on a Cardboard Cutout Bush and King Pig in the ending cutscene.
This is the first episode to have more than one King Pig appearance, due to the concept of the King distracting Birds with cardboard cutouts of himself. The second time happens in Mine And Dine. This is the last episode to contain 21 levels per theme.
WHAT A DIRTY TRICK
When the birds awoke the next morning, the eggs looked safe and sound. Then Red looked more closely. Those sneaky pigs had returned to the Great Cliffs and replaced the real eggs with cardboard cut-outs! Spotting Smooth Cheeks grinning from a distance, Chuck threw himself at the King, knocking him flat. Too flat in fact. It was another cardboard decoy. Those swine are getting sneaky.
When the birds complete Theme 4-21, they discover the King they defeated was, in fact, a cardboard cutout, and that the real King is still out there. Later, the Birds finally succeed after destroying another cardboard cutout in Theme 5-21 and retrieve the eggs. The real King Pig retreats while the Birds celebrate their temporary victory.
King Pig sleeping behind a cartboard cutout of himself.
The original Mighty Hoax icon, showing the King Pig with eyes more tightly shut.
The original version of the Mighty Hoax intro cutscene
The current version of the Mighty Hoax intro cutscene