So there are octopus, squid, and ammonite Pokemon. Wouldn’t it be cool to have a cuttlefish to complete the bunch? Maybe a vampyroteuthis as well? Perhaps even a nautilus if Omanyte is too divergent. Come to think of it, the blanket octopus is so strange it could deserve its own Pokemon (maybe one with some of that extreme sexual dimorphism). There could even be an alternate version of Omanyte based on nipponites for some real bizarreness.
Well, as luck would have it, you have – purely by coincidence and the alignment of the planets – come to the right place, because when I got my readers to collectively design a Pokémon one time aaaaaaaaages ago, they came up with a lava lamp squid that attacks with boiling oil, which we named Krakentoa. To put it another way – yeah, I’m kind of a fan of this. Cephalopods are just inherently fun to play with, thanks to their alien intelligence and highly unusual abilities. Although Omastar, Octillery and Malamar are all pretty cool and interesting Pokémon, there’s still a lot of unexplored creative space there, so even if we arguably don’t need more of them, I think there would be room for an eccentric designer to find some way of making additional cephalopod Pokémon conceptually distinct from their predecessors. Camouflage, shape-changing, deep-sea adaptations, “vampire” traits for the Vampyroteuthis… I think it might be fun to have a nautilus Pokémon that somehow referenced the Nautilus, Captain Nemo’s submarine from Twenty Thousand Leagues Under the Sea. Not sure of the best way to go about that, though.