A prehistoric Pokémon that died out when its heavy shell made it impossible to catch prey.
Blue
Yellow
Sharp beaks ring its mouth. Its shell was too big for it to move freely, so it became extinct.
Gold
Apparently, it cracked SHELLDER's shell with its sharp fangs and sucked out the insides.
Silver
Once wrapped around its prey, it never lets go. It eats the prey by tearing at it with sharp fangs.
Crystal
Its heavy shell allowed it to reach only nearby food. This could be the reason it is extinct.
Ruby
OMASTAR uses its tentacles to capture its prey. It is believed to have become extinct because its shell grew too large and heavy, causing its movements to become too slow and ponderous.
Sapphire
Emerald
An OMASTAR uses its tentacles to capture its prey. It is believed to have become extinct because its shell grew too large, making its movements slow and ponderous.
FireRed
Its tentacles are highly developed as if they are hands and feet. As soon as it ensnares prey, it bites.
LeafGreen
A prehistoric Pokémon that died out when its heavy shell made it impossible to catch prey.
Diamond
It is thought that this Pokemon became extinct because its spiral shell grew too large.
Pearl
Stadium 1
Attacks by ensnaring its enemy with its tentacles and biting with sharp fangs. Its overly-large shell makes it sluggish.
Stadium 2
Apparently, it cracked SHELLDER's shell with its sharp fangs and sucked out the insides.
TCG
Dark Omastar: Nothing can escape once wrapped in its tentacles, which it uses for self-defense as well as to catch food.
