Crazy Pig

Info
he has actually never said anything, he just makes weird noises................... during the Hogcott he died, however he cloned himself set up a machine, that when he dies 9000 years later the machine would transfer the soul of his clone into his real body. (the clone was weak and immobile due to it being in a box for 9000+ years) So 9000 years after the hogcott was angry birds space, so he ended up being the final boss.

Theory
It is thought that Crazy is the one who hired Assassin Pig to Kill Pig King Henry the 3rd