To play this, tap one of your Neopets. At the end of each of your turns, discard all your Neopets in this arena except the one this Petpet is attached to. (A Basic Neopet that's discarded is put on the bottom of it's owner's Neopet stack.)
Slorgy waited for his master to shake the packet, but there would be no treats for him, not for a while.