Animated movie about anthropomorphic cats searching for treasure

The movie was probably made before 2004. It was a full-length cartoon, that featured cats or other anthropomorphic animals, possibly foxes. In the movies they wear human clothes. One of the characters was carrying a fishing rode in one of the scenes. At some point they were looking for a treasure in dungeons or a cave. They get lost in the dungeon or cave and come across a skeleton or a gravestone. Then they make a full circle and see the same skeleton/gravestone again and one of the characters tries to explain it away buy saying that’s a different one.

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Reminds me of Animal Treasure Island (1971)

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@chisco Thank you for the suggestion, but the movie I am looking for featured only animals as protagonists

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Fantastic Mr Fox?

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@Stonebroke thanks for the suggestion, but the movie I am talking about was made before 2004 using traditional animation

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How about “The great mouse detective”:

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The Legends of Treasure Island?

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