You automatically earn one virtual object with each figure you use.  In power play mode, you can look at the drop down menu where as you win against each opponent, you also earn their object.

Put the object down on the “+” icon to unlock it. Once you have unlocked it, you can access it during future Power Play modes.

Items in blue are available to use.  Items in grey are objects that you have not earned/unlocked with the specific Apptivity WWE Rumblers figure you are using.  Objects in orange are those that you have selected to use.