Nicks for Cats

I don't know why it is that Alex and I can't seem to just call our cats by their given names and only their given names. Over the years, each of the cats has had their names mutated and now, all are called by more than one name, with poor Missy leading the lot with a string of them:

Tigger, Tiggermon (this was during the Pokemon rage, sad to say), Tigger Monster

Ve Ching, Shark Tail (he walks with his tail straight up in the air all the time, so sometimes, when he's walking behind the trunk or past the bed, all you can see is his tail cutting through the air)

Harmony, Harmo-namo-ny

Missy, Missymus, Missymus the Plumpypuss, Plumpy