Crystal Ruins

Crystal Ruins, also called CR, located in western Winden. It used to be the dungeon after Winden Forest, but was moved. Crystal Ruins and Crystal Castle were the first dungeons to be added to Winden after its release. It was once the hardest non-event and non-set-level dungeon in PMU 7 (later beaten by Mt. Barricade).

The Pokémon in this dungeon are mainly in the level range of 35-41, but Gastly are lower than 18, and Regice is level 60.

Scenery
The walls are crystal-like and dark blue with some green crystals scattered around. The floor is a light-blue stone, with some bluer rocks here and there. There is a darkness surrounding the player after floor 10, with the darkness eventually getting larger and larger, obscuring vision more and more. It is usually hailing.

There is a Sealed Chamber on floor 15 with chance of having Clear Silk.

Pokemon
All Pokémon in this dungeon spawn naturally and randomly. There is no guarantee that a player will encounter a Regice on their journey. There are Ghost, Water, and Ice types here. There is only one boss, and there is not no more darkness surrounding the player once they reach the boss room.
 * Gastly
 * Spheal
 * Haunter
 * Shellder
 * Sealeo
 * Swinub
 * Piloswine
 * Snorunt
 * Glalie
 * Regice (Random)
 * Mamoswine (Boss)

Items

 * Evasion Orb


 * Oran Berry


 * Aspear Berry


 * Warp Seed
 * Power Band
 * Leppa Berry
 * Mental Herb
 * Warp Orb
 * Poke
 * TM Ice Beam (Regice Rare Drop)

Dungeon Objectives
The main goal is like most other dungeons, to complete it and beat the boss(es). TM Ice Beam is also a very valuable and wanted item.

Trivia

 * This dungeon was made by Yatterman.
 * This dungeon (as well as the second half, Crystal Castle) was moved from the Winden Forest Relic and placed in the overworld of Winden as its own dungeon.
 * There is a story surrounding the creation of this dungeon as well as the Crystal Castle. It is known as The Story of Winden.
 * Announced only a while before the release of Tanren, Yatterman had mentioned that Crystal Ruins and Crystal Castle would be removed from Winden Forest, and be added to the overworld of Winden as its own dungeon. However, this was pushed back for some time due to personal issues outside of the game. Yatterman vowed to move the two dungeons before the end of December 2012, but it was moved in January 2013 instead.
 * Kabuto was a spawn in this dungeon, however it was removed with the introduction of the Dome Fossil which can now be found there.
 * Regice has multiple Buffs placed on it.