Banger is a bird that has the ability to Explode at enemies. He never met Fireworks Dave. Few birds were alive when he was. The birds split up into two sides. Good and Evil. He was actually the first Angry Bird alive. He was the leader for a few years. If you want to read more about the fight, see The Fight Part 1.
List of Good and Bad Birds
Fireworks Dave (Only one that ever found Entexo and Entexo Jr. after the fight)
Entexo (Never found after fight)
Entexo Jr. (Never found after fight)