A new boss to the series (though based on a semi-forgotten regular foe Iron Mam), Grand Mam challenges Kirby a little over halfway through the game.
A titan with powerful attacks, getting through her armor is the tricky part.
You need to use the right powers on the Friend Star to take down the boss.
And she'll eventually fall to our favorite pink Nintendo hero and his team. This was one of my favorite bosses in the whole game. A very unique and fun surprise.