He's named after the 'glasgow grin', where a knife or other sharp object is used to slit the corners of the mouth and cheeks into a 'smile' - think of the live-action movie Joker for a good example. So I'm looking for a pet with a big 'smile', the nastier the better. I've looked at the Nightmare and Bloodred colours but I can't decide which of them has the nastiest mouth.

Or I could stick with the pirate theme, make him Hydrus and use an overlay. What do you think?

These two have the absolute creepiest smiles in my opinion, especially the torrent.

Fish should not have that many teeth oh god.

omg the Nightmare Charlie 100% i mean, just look at it Q________Q (also one of my favourite Nightmare pets!)

i'd say either the nightmare charlie, feli, or chai.

the charlie definitely has the biggest grin, but the feli sort of appears to have those slits, and the chai really pulls off that crazed grin.

Thanks for the suggestions, guys. :)