Royal Delight

King Slime only hands this out on Master, and at a rate generous enough that a couple of kills usually produces one. The pet is a shrunken king with a blush and dotted eyes, and it is half of a pair. The Regal Delicacy summons his counterpart, and the two can be combined into the Resplendent Dessert if you would rather have one item than two.

Get far enough ahead of him, or high enough off the ground, and he drops the crown, balls up and flies after you, dripping the whole way. Leaving the crown on the floor is the same gag King Slime does when he teleports during his fight.