The Demon H1N1 is one of the Possessed Bosses found in Robot Factory outside of Metreon. After reaching level 76, players may rarely encounter this boss. Its level is always three above the player, and it has a minimum of 1,450,000 HP at level 79, increasing by 50,000 every level.
Yikes! This boss has been possessed (said by the game upon meeting any possessed boss)