Natlant and Nautstar are Water/Steel type Pseudofossil Pokemon.
Appearance:
Natlant is a nautilus-like Pokemon that existed since prehistoric times. It has 4 tentacles, with a round, spherical body, with two rectangular eyes. It has a shell similar to its close relatives Omanyte and Omastar, but unlike Omanyte and Omastar, Natlant has a light gray and beige pattern on its shell.
Nautstar is an ammonite-like Pokemon that existed since prehistoric times. It has an appearance similar to its pre-evolved form Natlant, with a few extra differences. It has three cannon-like points that it uses for defense. Its light gray and beige pattern is absent but is now a light gray dot with an ochre-colored dot inside of it, but the shell's spiral is still present. It has a squid like body from the hole of its shell, with 8 tentacles, along with two eyes on the front and the back of its squid-like body.
Behavior:
Natlant shares traits from its relative Omanyte, but they are curious about its surroundings. They feed on Oran Berries and Pecha Berries, so they can still live. They are avoided by other predators as Natlants taste like rusted steel.
Nautstar shares traits from its relative Omastar and its pre-evolution Natlant. Despite its fearful appearance, they are actually passive. It shoots out ghostly energy to for the predator that is trying to eat it to get consumed by the ghostly energy, allowing the Nautstar to escape.
Trivia:
Just like their counterparts, Sanyouch and Bingare, they are also Pseudo fossil Pokemon.
Natlant and Nautstar sometimes feed on nectar.