Please, Omanyte (Ammonite) and Omastar are clearly
Tommotia. That said, despite the ammonite-like (which are more closely related to modern squid than nautiloids anyhow) features, I always thought they looked more like gastropods; sea snails or something. Then again, the last time Game Freak actually made a sea slug Pokemon...
=
Suffice to say I shouldn't be looking for something too purist in a flashy Japanese battle game.
Still, be that as it may, those plus Octillery makes only three cephalopods, two cutesified and one silly. I want a
cool one, like Scolipede or Empoleon. A big grumpy squid with old-man eyebrows and an armour-plated mantle, with big fists instead of arm clubs. That's what I want. And a tentacle moustache like Octodad.
I should totally draw this.