In the games
In Diamond, Pearl, and Platinum, they are no longer key items, being demoted to simply items. They can be found by mining in the Underground after obtaining the National Pokédex. Helix Fossils are more common in Diamond while Dome Fossils are more common in Pearl. If brought to the Oreburgh Mining Museum, the Dome and Helix Fossils can be regenerated into Kabuto and Omanyte, respectively.
In HeartGold and SoulSilver, the Dome and Helix Fossils can be found randomly by smashing rocks at the Ruins of Alph. The Dome Fossil is exclusive to SoulSilver while the Helix Fossil is exclusive to HeartGold. If brought to the Pewter Museum of Science, the Dome and Helix Fossils can be regenerated into Kabuto and Omanyte, respectively.
In Black and White, a Worker in the Ice Rock room of Twist Mountain hands out a random Fossil from previous generations, including the Dome and Helix Fossils, once per day. If brought to the Nacrene Museum, the Dome and Helix Fossils can be regenerated into Kabuto and Omanyte, respectively.
In the anime
In the main series
In A Night in the Nacrene City Museum!, a Dome Fossil was first seen chasing Hawes, as he claimed it to be doing, but was later seen safely placed in a display case. Hawes later explained what it was to Ash and his friends. It was later revealed that the Yamask in the Nacrene City Museum was using its move Psychic to make the Dome Fossil float and chase after Hawes after he put its mask in a display case, thinking that it was a replica Yamask mask given to him as a gift from the company that made a Cofagrigus replica after purchasing it from them for the museum.
In Pokémon Origins
In the TCG
Both Fossils appear on the artwork for the Mysterious Fossil card. However, the artwork depicts the Dome Fossil as the Fossil of a Kabutops, Kabuto's evolution, rather than of a Kabuto. The two Fossils were later split off into their own individual cards.
| Related cards|
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.
|Mysterious Fossil||T||Fossil||62/62||Mystery of the Fossils|
|EX Legend Maker||79/92||Mirage Forest||078/086|
|EX Holon Phantoms||92/110|
|EX Power Keepers||85/108||World Champions Pack||087/108|
|Dome Fossil||T||Majestic Dawn||89/100||Dawn Dash|
|Arceus||92/99||Advent of Arceus||082/090|
|Helix Fossil||T||Majestic Dawn||91/100||Moonlit Pursuit|
|Arceus||93/99||Advent of Arceus||081/090|
This is the artwork of the Fossils in The Underground:
|Helix Fossil||Dome Fossil|
This is the artwork of the Fossils in the Pokémon Dream World:
|Helix Fossil||Dome Fossil|
In other languages
|This item article is part of Project ItemDex, a Bulbapedia project that aims to write comprehensive articles on all items.|