Omastar is a Pokémon similar to an ammonite. Its sky blue body has several tentacles; the tentacles toward the front are shorter and thicker than those in the back. There is a pale yellow, helix spiraled shell on its back. Several sharp spikes line the shell's midsection from the front to about halfway down its back. The shell's rim has two circular indents where Omastar's eyes are visible. Its eyes have yellow sclerae and vertically-slit pupils. It has an oval mouth with a four-sectioned, fang-like beak.
It is believed that Omastar's extinction was a consequence of the increasingly heavy weight of its own shell that affected its mobility, including its hunting. Omastar swam the seas in search of prey, including prehistoric Shellder. Omastar's used it tentacles to ensnare its prey before biting down with the deadly force of its beak. With the shell broken, it would suck out the contents. Omastar was in turn preyed upon by Carracosta. Omastar is thought to be a distant ancestor to Octillery.
Major appearances
Two Omastar debuted in Attack of the Prehistoric Pokémon, alongside all of the other Generation I Fossil Pokémon. They were sleeping under Grampa Canyon until a dynamite blast woke them up. The Rock/Water-type Fossil Pokémon chased Ash Ketchum and Team Rocket until Aerodactyl showed up and scared them off.
Multiple Omastar appeared in Fossil Fools, alongside their pre-evolved form Omanyte. These Pokémon were discovered to be living in the Ruins of Alph, but they were moved into a museum.
An Omastar appeared in Dealing With Defensive Types! in the Canalave Gym. It caught Team Rocket trying to steal food from the Gym kitchen whilst Ash was having his Gym battle with Byron, and attacked them with Water Gun, sending them blasting off.
Minor appearances
A Omastar appeared in Pikachu's Vacation as one of the Pokémon seen at the Pokémon Theme Park.
An Omastar appeared in Team Rocket's fantasy in Imitation Confrontation.
An Omastar appeared in a fantasy in A Ruin with a View.
An Omastar appeared in a fantasy in Where's Armaldo?.
An Omastar appeared in Lucario and the Mystery of Mew as one of the Pokémon living in the Tree of Beginning. Also, one appeared in the opening sequence of the movie.
Dr. Yung uses a Mirage Omastar in The Mastermind of Mirage Pokémon.
Pokédex entries
Episode
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Pokémon
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Source
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Entry
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EP046
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Omanyte, Omastar, Kabuto, and Kabutops
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Ash's Pokédex
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Omanyte and Omastar, Kabuto and Kabutops. It is believed these Pokémon became extinct tens of thousands of years ago. The details of their behavior is shrouded in mystery. Though some have speculated that they may still exist, none of these Pokémon have ever been seen alive.
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Original series entries continue below.
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Episode
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Pokémon
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Source
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Entry
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EP163
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Omastar
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Ash's Pokédex
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Omastar, the evolved form of Omanyte. This extinct Pokémon is believed to have used its sharp fangs to break through the shells of its prey in order to feed.
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