what anime is this?

ok soo a few years back i started watching an anime but never finished it because my internet was down. i forget what it was called and forget a lot of the story line.
Its about ghosts of some sort... i have been looking everywhere. The picture is the cat from the anime. He was the main characters side kick kind of...

Im so sorry i don't have much more info.. i have a terrible memory and it was very long ago.