Hit him if u have too
If she is gullible tell her that you booby trapped all of you stuff, and only you know how to disarm them.
Tell him to stop!
Scare him or hide the disk.
you have to stop playing little league at age 12. but you can play juniors (13-15) or seniors(16-18)
tell him it fell in the toilet after you peed
Hide the game or make fun of Him for playing it
when he wants you to doing something don't do it or just bother him or scream stop in his ear until he stop's
By treating him as your child, not your little brother. Show him who is in charge. If he doesn't behave properly, confiscate his toys. Make him sit in the corner. Stop him from watching TV. Whatever your parents do to stop him from misbehaving, do the same.
maybe you should share your stuff and be nice unless she is trying to steal your condoms or something
Take the flute from him and whack him over the head with it. That should work :D
When you feel you're about to hit him scream/yell in a pillow or punch the wall
their is no way to stop it unless you are playing online if it is online hook the internet up to your game console no to other stuff