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 . It is the counterpart of the Dome Fossil.
==In the core series games==
===Price===
|}
|}
===Effect===
If brought to the one of the following locations, the Helix Fossil can be regenerated into an .
{| border=1 style="background:#FFF; border:1px solid #; border-collapse:collapse"	
Games	Location
/ 	Cinnabar Lab
 	Oreburgh Mining Museum
 	Pewter Museum of Science
 	Nacrene Museum
 	Ambrette Town Fossil Lab
 	Devon Corporation in Rustboro City
 	Fossil Restoration Center on
====Generation I and III====
In the Generation I and III games, the Helix Fossil is a Key Item.
In , 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.
===Description===
|}
|}
===Acquisition===
|-
| /
| Mt. Moon (choice between this and the Dome Fossil)
| 
|-
| 
| Mt. Moon (choice between this and the Dome Fossil)
| 
|-
| 
| 
| Underground (after obtaining the National Pokédex)
|-
| 
|
| (Ruins of Alph)
|-
| 
|
| Twist Mountain (after obtaining the National Pokédex)
|-
| 
|
| Twist MountainJoin Avenue ()
|-
| 
| 
| (Glittering Cave, after entering the Hall of Fame)
|-
| 
| 
| (Mirage spots)
|-
| 
| 
| Trade
|-
| 
| Konikoni City ()
| Poké Pelago (Isle Aphun: Rare-Treasure Hunting, Interesting-Item Hunting)
|-
| 
| Mt. Moon (choice between this and the Dome Fossil)
| Cerulean Cave
|-
| 
| 
| Grand Underground (after defeating or capturing /)
|}
|}
==Gallery==
===Artwork===
Artwork from
===Sprites and models===
 	 	 	
Overworld sprite from	sprite from, and	Model from	sprite from
==In the spin-off games==
===Pokémon Trading Card Game Pocket===
Helix Fossil was introduced as an in Pokémon Trading Card Game Pocket in the expansion. Like its TCG counterparts, it is played as if it was a Basic Pokémon.
==In animation==
===Pokémon Origins===
A Helix Fossil briefly appeared in File 2: Cubone, where it was shown being hogged by a at Mt. Moon.
==In the TCG==
The Helix Fossil was introduced as a in the Pokémon Trading Card Game in the expansion, first released in the Japanese expansion. As a , after being played it is put onto the Bench as a Basic Pokémon. When the player attaches a from their hand to the Helix Fossil, its allows them to search their deck for an that evolves from a Helix Fossil and evolve Helix Fossil into the Omantye. Afterwards, the player shuffles their deck.
During the XY Series, the expansion included the . 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 in the expansion. This card is similar to the original Helix Fossil, being another Fossil Trainer card. It has an that blocks the opponent from playing any s from their hand, as long as Antique Helix Fossil is in the Active Spot.
Helix Fossils are also featured on the and cards. They are also Fossil Trainer cards which can evolve into certain Omanyte. A Helix Fossil is also on , which is a Pokémon which evolves in the same way Mysterious Fossil does.
==Trivia==
* In the first 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 as "Lord Helix".
** In Pokémon Omega Ruby and Alpha Sapphire, when the language is set to French, before battle Brawly says, "J'ai découvert le secret de la vraie puissance en fixant un Nautile pendant des jours et des jours..." ("I discovered the secret of true power by staring at a Helix Fossil for days and days..."), referencing the aforementioned meme.
==In other languages==
==Related articles==
* List of Key Items in Generation I
* List of Key Items in Generation III
Category:Fossils
Category:Key Items
de:Helixfossil
es:Fósil hélix
fr:Nautile
it:Helixfossile
ja:かいのカセキ
zh:贝壳化石（道具）