You press Ctrl+Shift+C and then type TestingCheatsEnabled True (if it says command is not recognized try it without the capitals) You then go to the grave of the ghost you want to delete and then Shift+Click the gravestone and then press delete. You can also Shift+Click the ghost Sim and then press delete and this also works with deleting normal Sims as well.
Chat with our AI personalities
You will need to download the Sims 3 Nude Patch to remove the blur.
You can't
go to the graveyard after dark, you have to catch the actual ghosts(the ones that are like transparent sims, not the spirits that look like halloween ghosts)
Put them in your yard and every now and then they will come out.
To get rid of a robot on Sims 3, you must first go up to the robot and argue with it a lot. Then once you've fought with it enough, it eventually flat out hates yu and leaves.