Helix Fossil

The Helix Fossil (Japanese: かいのカセキ Shellfish Fossil) is a Fossil introduced in Generation I that can be regenerated into Omanyte. It is the counterpart of the Dome Fossil.

Helix Fossil
Shellfish Fossil
Bag Helix Fossil Sprite.png
Helix Fossil
Pokémon Global Link artwork
Introduced in Generation I
Generation I Bag Key Items HGSS pocket icon.png Key items
Generation III Bag Key Items HGSS pocket icon.png Key items (FRLGE)
Generation IV Bag Items HGSS pocket icon.png Items
Generation V Bag Items HGSS pocket icon.png Items
Generation VI Bag Items HGSS pocket icon.png Items
Generation VII Bag Items HGSS pocket icon.png Items
Generation VIII Bag Treasures SwSh pocket icon.png Treasures (BDSP)
Power 100

In the core series games


Games Cost Sell price
N/A  500
SMUM N/A  3,500
US  7,000  3,500


If brought to the one of the following locations, the Helix Fossil can be regenerated into an Omanyte.

Games Location
Cinnabar Lab
Oreburgh Mining Museum
HGSS Pewter Museum of Science
BWB2W2 Nacrene Museum
XY Ambrette Town Fossil Lab
ORAS Devon Corporation in Rustboro City
SMUSUM Fossil Restoration Center on Route 8

Generation I and III

In the Generation I and III games, the Helix Fossil is a Key Item.

In Pokémon Emerald, the Helix Fossil (as well as the Dome Fossil and Old Amber) is found in the game data, but it is not legitimately obtainable and has no effect. The player is unable to regenerate this fossil in the Devon Corporation.

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.


Games Description
Stad A fossil of a Pokémon that lived in prehistoric times.
E A piece of ancient marine Pokémon's seashell.
FRLG A fossil of an ancient, seafloor-dwelling Pokémon. It appears to be part of a seashell.
A fossil of an ancient Pokémon that lived in the sea. It appears to be part of a seashell.
A fossil from a prehistoric Pokémon that once lived in the sea. It might be a piece of a seashell.


Games Finite methods Repeatable methods
RBY/RGBY Mt. Moon (choice between this and the Dome Fossil)
FRLG Mt. Moon (choice between this and the Dome Fossil)
DPPt Underground (after obtaining the National Pokédex)
HGSS Rock Smash (Ruins of Alph)HG
BW Twist Mountain (after obtaining the National Pokédex)
B2W2 Twist Mountain
Join Avenue Antique Shops
XY Rock Smash (Glittering Cave)Y (after entering the Hall of Fame)
ORAS Rock Smash (Mirage spots)AS
SM Trade
USUM Konikoni City (Olivia's jewelry shop)US Poké Pelago (Isle Aphun: Rare-Treasure Hunting, Interesting-Item Hunting)
PE Mt. Moon (choice between this and the Dome Fossil) Cerulean Cave
BDSP Grand Underground (after defeating or capturing DialgaBD/PalkiaSP)



Artwork from
Generation I

Sprites and models

Overworld sprite from
Generation I
Underground sprite from
Diamond, Pearl, and Platinum
Model from
Let's Go, Pikachu! and Let's Go, Eevee!
Grand Underground sprite from
Brilliant Diamond and Shining Pearl

In the anime

A Helix Fossil in Pokémon Origins

Pokémon Origins

A Helix Fossil briefly appeared in File 2: Cubone, where it was shown being hogged by a Super Nerd at Mt. Moon.

In the TCG

Helix Fossil in the TCG
Main article: Helix Fossil (Majestic Dawn 91)

The Helix Fossil was introduced as a Trainer card in the Pokémon Trading Card Game in the Majestic Dawn expansion, first released in the Japanese Moonlit Pursuit expansion. Although it is a Trainer card, it is played as if it were a Colorless-type Basic Pokémon, meaning the player's opponent takes a Prize card when it is Knocked Out. However, Helix Fossil can't be affected by any Special Conditions, can't retreat, and the player may choose to discard it at any time during their turn. When the player attaches a Water Energy from their hand to the Helix Fossil, they get to search their deck for an Omanyte that evolves from a Helix Fossil and put it on top of it. Afterwards, the player shuffles their deck.

During the XY Series, the Fates Collide expansion included the Item card Helix Fossil Omanyte. It allows players to look at the bottom seven cards of their deck, reveal an Omanyte they find there, and put it onto their Bench. The other six cards are then shuffled back into the deck. The Scarlet & Violet Series saw the release of Antique Helix Fossil in the 151 expansion. This card is similar to the original Helix Fossil, as it is played as a Basic Pokémon, evolves into Omanyte, can't retreat, is not affected by Special Conditions, and may be discarded at any time during the player's turn. In addition, it blocks the opponent from playing any Stadium cards from their hand, as long as Antique Helix Fossil is in the Active Spot.

Helix Fossils are also featured on the Mysterious Fossil, Buried Fossil, and Unidentified Fossil cards. All of these cards are played as if they were Basic Pokémon and can evolve into Omanyte.


Bulbanews has an article related to this subject:
  • In the first Pokémon Red and Blue run of Twitch Plays Pokémon, the chaotic control scheme resulted in the player constantly using the Helix Fossil. This lead to jokes that the game's protagonist was constantly consulting it for advice. This resulted in memes that the player worshiped the Helix Fossil and fans referred to Omanyte as "Lord Helix".

In other languages

Language Title
Chinese Cantonese 貝殼化石 Buihok Fasehk
Mandarin 貝殼化石 / 甲壳化石 Bèiké Huàshí
  French Nautile
  German Helixfossil
  Italian Helixfossile
  Korean 조개화석 Jogae Hwaseok
  Brazilian Portuguese Fóssil Espiral (TCG)
Helix Fossil (The Official Pokémon Handbook)
  Spanish Fósil Helix

See also

Pokémon Fossils
HelixDomeOld AmberRootClawSkullArmor

  This item article is part of Project ItemDex, a Bulbapedia project that aims to write comprehensive articles on all items.