Well, I'm not a ghost expert, you will probably have to find one in the absence of John, but in the game there were instances of Pokemon dying--and you had to fight one as a ghost. It's all in a little place called Lavender Town.

[A spooky scary place that Jade has no idea has been redesigned to be more linear in current generations.]

You're on fire with these Eevee puns, Strider, we're going to have to get a Vaporeon to put you out at this rate!