Answer:
Kings and queens may cling to power and the jesters may have their call. I am the most common but I can rule them all. What am I?
I can never be stolen from you. I am owned by everyone. Some have more some have less.
Though I am only two words I have thousands of letters in me
The 8 of us go forth and not back to protect our king from a foe's attack. What am I?
I regularly change shape yet remain a sphere. I am always there but not often seen. What am I?
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.