Mollux, the Gastro Lamp Pokemon
Black: In some cultures, drinking the fluid from its shell is said to be the mark of a true man. In others, it is said to be the mark of a true imbecile.
White: Its harpoon-like tooth is renowned for its effectiveness. Some island communities like to use them to slice their fried Magikarp.
NB. Species name is a pun on "Astro Lamp" and "Gastropod" in case anyone was wondering.
I don't have a hope in hell of being slated but I hope we have all learned something from this. This was certainly one of the better Dex entry threads in recent memory, if only because there was an actual argument. To be quite honest none of the submissions stand out to me, but that's probably a good thing as it means none of them are too outlandish or objectionable (though I do think that Dex entries ought to be one of those things we can have more fun with, it appears some others take them very seriously indeed...)