Odd Keystone

Odd Keystone
Odd Keystone
Odd Keystone
Underground sprite
Introduced in Generation IV
Generation IV Bag Items pocket icon.png Items
Generation V Bag Items pocket icon.png Items
Generation VI Bag Items pocket icon.png Items
Generation VII Bag Items pocket icon.png Items
Power 80

The Odd Keystone (Japanese: かなめいし Keystone) is a type of item introduced in Generation IV. Odd Keystones act like containers, capable of trapping and binding Spiritomb inside themselves. All Spiritomb use it as a base.

In the core series games


Games Cost Sell price
N/A  1,050

In the Generation V games, the Odd Keystone can be sold to the ore maniac inside the Icirrus City Pokémon Center for  3000.


In Pokémon Diamond, Pearl, and Platinum, an Odd Keystone can be placed in the Hallowed Tower, which is located on Route 209 in the Sinnoh region. This item has no use in other regions.

If the player talks to 32 or more other players in the Sinnoh Underground after placing the Odd Keystone, a wild Spiritomb will be encountered the next time the player inspects the Hallowed Tower. While in theory it is necessary to talk to 32 different players, in practice another player can be counted twice as long as the player themselves leaves the Underground or enters their Secret Base using the "close door and decorate" function between the interactions; this potentially allows a player to encounter Spiritomb by interacting with the same player 32 times.

Once placed in Hallowed Tower, the player can check the Odd Keystone to track their progress. The message gradually changes as the player interacts with more players in the Underground.


Games Description
A vital item that is needed to keep a stone tower from collapsing. Voices can be heard from it occasionally.


Games Finite methods Repeatable methods
DPPt Twinleaf Town, Route 208 The Underground
HGSS Trade
BW Trade
B2W2 Join Avenue Antique Shop


Model from
Omega Ruby and Alpha Sapphire

Other appearances

Spiritomb, with the Odd Keystone visible at the base of its body

The Odd Keystone is clearly visible on Spiritomb's body.

In Pokémon Omega Ruby and Alpha Sapphire, an Odd Keystone appears in the overworld on Sea Mauville. It appears just before the player faces Spiritomb and therefore cannot be collected. Documents aboard the ship reveal it was originally donated by the Oreburgh Mine.

In spin-off games

Pokémon Mystery Dungeon series

In Pokémon Mystery Dungeon: Explorers of Time, Darkness, and Sky, when the player and partner reach Sealed Ruin Pit (the ultimate floor of Sealed Ruin), they only see an Odd Keystone, not realizing it is a Pokémon. Suddenly, it will reveal itself to be Spiritomb and attacks the duo.

In Pokémon Mystery Dungeon: Explorers of Time, Darkness, and Sky, Spiritomb's sleeping sprites involve it returning to the Odd Keystone.

In the anime

An Odd Keystone in the anime

In The Keystone Pops!, while Ash and Dawn were having a practice battle between Buizel and Aipom, Buizel's Sonic Boom accidentally destroyed the Hallowed Tower, releasing a Spiritomb from the Odd Keystone sealed inside of it. Ash and Pikachu later battled Spiritomb, eventually defeating it and resealing it back into the Odd Keystone, which was then placed back into the rebuilt Hallowed Tower.

In the manga

An Odd Keystone in Pokémon Adventures

Pokémon Adventures

Diamond & Pearl chapter

Cynthia's Spiritomb is connected to an Odd Keystone, which was fully seen in Shunning Spiritomb, when the Forbidden Pokémon was frozen by Cyrus's Weavile and it retracted into the stone.

Platinum chapter

An Odd Keystone appeared in Leaping Past Lopunny among the rare stones that Steven had found during his stay in Sinnoh.

In other languages

Language Title
Chinese Cantonese 楔石 Sitsehk
Mandarin 楔石 Xiēshí
  Finnish Outo riimukivi
  French Clé de Voûte
  German Spiritkern
  Italian Roccianima
  Korean 쐐기돌 Sswaegi Dol
  Polish Dawne Więzienie*
Stary Kamień*
  Brazilian Portuguese Pedra sagrada*
Pedra única*
  Spanish Piedra Espíritu*
P. Espíritu*
Piedra Base*
  Vietnamese Đá Đỉnh Vòm

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