There isn't one on the psp

To put games in your psp you have to slide the silver rectangle to the right and a the back will come out then just put the game in and play

There is a silver rectangle on the screen slide across to the right and it will be unlocked

Your pitbull could be lonely or it may be restless. Try putting on the radio at night quietly so that your puppy wouldn't think he is alone. You can also buy him a toy from your local animal shop but make sure that is a kong labled toy because other toys can damage its dentures