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
PE N/A  500
BDSP N/A  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 The 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


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

The following is a list of cards mentioning or featuring Helix Fossil in the Pokémon Trading Card Game.

Helix Fossil
Cards listed with a blue background are only legal to use in the current Expanded format.
Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.
Card Type English
Rarity # Japanese
Rarity #
Mysterious Fossil T Fossil   62/62 Mystery of the Fossils    
Legendary Collection   109/110      
EX Sandstorm   91/100      
EX Legend Maker   79/92 Mirage Forest   078/086
EX Holon Phantoms   92/110      
EX Power Keepers   85/108 World Champions Pack   087/108
Helix Fossil T Majestic Dawn   91/100 Moonlit Pursuit    
Arceus   93/99 Advent of Arceus   081/090
Helix Fossil Omanyte I Fates Collide   102/124 Awakening Psychic King   069/078


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.