How do you defeat the king in marshmallow kingdom?

To defeat the King in Marshmallow Kingdom, you need to strategically upgrade your marshmallow troops and utilize their unique abilities effectively. Focus on exploiting the King's weaknesses by targeting his minions first to weaken his defenses. Timing your attacks and using special items can also turn the tide of battle in your favor. Coordinate with allies if available to create a combined strategy for a more effective assault.