In the last moments of the game, Kamek steals all the dream gems and makes a wish, for his master Baby Bowser to get a giant robot.
I have to admit, Kamek is oddly loyal. He could have wished to be king instead, or anything else really.
He's got a pretty crazy robot form though. The key is obviously to destroy this two things to your right and left.
While avoiding a few other dangers to yourself.
But it isn't hard to topple the infant King Koopa. It's a good boss fight, but far from the series best.
This is the end right? Oh...no, he's going to take on another form, because one wasn't enough.