How Much More Health Do Bosses Have In Cuphead Multiplayer?

How Much More Health Do Bosses Have In Cuphead Multiplayer? Boss HP is doubled when in 2 player mode, monsters are unaffected. Do bosses have more health in co-op? yes. if i remember clearly, i once heard someone say that in multiplayer, bosses have twice as many health that they would have in singleplayer. Yep.