Crystal Ruins

Crystal Ruins, also known as CR, is located in western Winden. 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 spawn lower than level 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. Foggy and Cloudy Weather can also obscure vision.

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

Pokémon
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.

Regice
From 11F upwards, Regice has a chance to spawn, although in rare cases it will make a surprise attack. Regice can drop an Ice Diamond, TM Ice Beam, and a Regice Heart Slate.

Regice spawns at level 60 and has the following moves:
 * Ice Beam
 * Zap Cannon
 * Hyper Beam
 * Icy Wind

Boss
The boss of Crystal Ruins is a Mamoswine, it doesn't drop anything and has the following moves:
 * Ice Beam
 * Bulldoze
 * Dig
 * Take Down

Before Battle: Who are you to infiltrate this place!?

I am the mighty Mamoswine, and i shall not let you pass! Prepare to be squashed like the insect you are!

Dungeon Objectives

 * The main goal is like most other dungeons, to complete it and beat the boss(es).
 * Obtain TM Icebeam as it spawns here.
 * Obtain a Regice Heart Slate, as Regice spawns here.

Trivia

 * This dungeon was made by Yatterman.
 * On January 2013 this dungeon, as well as Crystal Castle, was moved from Winden Forest Relic and placed in the overworld of Winden as its own dungeon
 * The story surrounding the creation of this dungeon as well as Crystal Castle is known as The Story of Winden.
 * Kabuto used to spawn in this dungeon, however the spawn was removed with the introduction of the Dome Fossil, which can now be found here.
 * Regice spawns with multiple Buffs placed on it.
 * Regice, unlike other legendaries, has a lower chance of dropping a Heart Slate to offset how often it appears.