HP: 7; the first battle with Baby Bowser is more of a tutorial than a Boss battle.
HP: 13; the battle with this strange creature is more of a tutorial than a Boss battle.
HP: 100 Each
Bowser and Baby Bowser
HP: 1200 (bowser) 700 (Baby Bowser)
HP: 950, then 1150
HP: life meter contains 10 shroob heads. The actual final boss of the game, he is just Boswer revived with the Power of elder Princess Shroob. This is an out of the ordinary battle. You cannot attack shrowser, instead You have dodge all of his attacks. All of he dodged attacks then return and damage the ghost of Princess Shroob's Twin. Once the life meter is depleted the battle is over.