The 2nd Airborne Pulverizer also serves as a bonus boss in a special mission unlocked by completing all other missions in the game. Bosses have unique names, can be a character or a monster, and have high stats and potentially unique skills. Games and their corresponding final bosses: Armored Core: Last Raven - either the Airborne Pulverizer, Evangel, Jack-O, the Leviathans, or Zinaida depending on the route taken. As with most games, they tend to appear at the end of a specific portion of the game, and are related to the story event. Bosses are enemies in Xenoblade Chronicles.