Ultron Pig

Ultron Pig is a pig from Angry Birds:The Avengers: Age of Ultron and The Angry Birds 3: Elite's Revenge

Angry Birds: Avengers: Age of Ultron
Ultron Pig appears in Angry Birds: Avengers: Age of Ultron as a boss

The Angry Birds 3: Elite's Revenge
Ultron Pig also appears in The Angry Birds 3: Elite's Revenge as a creation by Corporal Pig along with Master Pig,Macklepig,The Collector Pig,and Piggy Lewis as a plan to destroy Elite.At a later part of the movie,Ultron Pig gets shot and killed by Elite

Future
Even though Elite shot and killed Ultron Pig,Master Pig revives Ultron Pig to destroy Elite once more in The Angry Birds 4: Corporal Pig's Mechanical Pigs.

The Angry Birds Go To The Movies
In Season 2 of The Angry Birds Go To The Movies,Ultron Pig makes cameo appearances in some episodes like "The Angry Birds in Cloudy with a Chance of Meatballs 2"