I'm going to delete my brothers Pokemon save on my cartridge without telling him.
Why do you want to delete your brother's pokemon save on your cartridge?
I want to see him devastated and cry like a baby.
People work hard trying to achieve things while playing games. You shouldn't delete other people's successes. It's best to be kind to your brother or he may retaliate.
I don't care what you think, I'm going to delete his save on my Pokemon game.
You're going to hurt your brother, ruin your relationship, and generated a lot of negativity. Or, you could by a little trophy with his name on it and take him out for a hamburger. Which sounds like it would bring more joy into the world?