Last year we had a Puma in the Netherlands. the news blew it up and some photos were published. In the end it appeared to be an oversized, long black haired cat, like the ones that live in my neighbors forest... I used to work with a guy, he told me his cat was so fat, it weighed 16 kg. Some overfed cats, the long haired ones in praticular, because they look more massive, can sometimes become subject of an urban legend.
About ugly creatures, my father has a relation in the horse breeding business. The wife has Jack Russels (as is an appropriate must for all horse people it seems..??) and the man himself liked a Dobermann better... Somehow these two managed to mate. The result was the most ugliest sort of dog you've ever seen, but he had no problem of selling them, it seems people kinda liked to show off to their neighbors with an odd creature that nobody has ever seen ! ???