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There was a show called Little Ghosts with an episode with that premise. It's so obscure that I can hardly find a pic or vid, but here's a link to that episode
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Sorry my connection acted up and I ended up double posting. To take advantage of this, here's the only pic I was able to find that may be referring to the show
◊, and that pic comes from this page
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I think it's Western Animation.
There was a kids' cartoon way back around 2000-2002. It had ghosts as characters and a haunted house setting. No, it wasn't Casper.
I remember an episode being about one of the ghosts finding a weather machine and using it to annoying the other ghosts by changing the weather repeatedly.
I know that's really vague, but tell me any suggestions you can find of it.