In the core series games
Price
Effect
Passive effect
If brought to the one of the following locations, the Helix Fossil can be regenerated into an Omanyte.
Generation I and III
In the Generation I and III games, the Helix Fossil is a Key Item.
Generation IV onward
From Generation IV onward, the Helix Fossil is no longer a Key Item, and is a normal item. Therefore, multiples of them can be obtained, they can be held, and sent to other players via trading.
Description
Games
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Description
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Stad
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A fossil of a Pokémon that lived in prehistoric times.
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E
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A piece of ancient marine Pokémon's seashell.
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FRLG
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A fossil of an ancient, seafloor-dwelling Pokémon. It appears to be part of a seashell.
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DPPtHGSS BWB2W2
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A fossil of an ancient Pokémon that lived in the sea. It appears to be part of a seashell.
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XYORAS SMUSUM
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A fossil from a prehistoric Pokémon that once lived in the sea. It might be a piece of a seashell.
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Acquisition
Appearances
In the animeIn the TCG
Both the Dome and Helix Fossils appear on the artwork for the Mysterious Fossil card. The two Fossils were later split off into their own individual cards.
Trivia
Bulbanews has an article related to this subject:
In other languages