Chamber of the Jewel is a secret chamber in the cavern on Route 13. It requires HM8 Rock Climb, as well as 4 specific forms of Unown to access. The deepest part of this chamber is where Mythical Pokémon Diancie waits for the player.

Notable Event

Catching Diancie

The crystals around Route 13 is said to attract the Jewel Pokémon Diancie. It has stayed here for a long time to secure all those glowing crystals. Its chamber is locked by a door with "Open" carved in Unown text. After acquiring Harvest Badge, players may bring a Pokémon that knows Rock Climb, as well as the Unown O, P, E and N in party to unlock the door. Unown can be found in Desert Catacombs on Route 11.


The door blocking Chamber of the Jewel, with "Open" written in Unown text.

Upon entry and hopping down a couple of ledges, a long passage leads the player to another set of stairs back up. At the end of this staircase, a frozen lake with shining crystals around the walls can be seen, with Diancie on a small island in the middle. Reach Diancie through the stone path and click on it to initiate the battle. Players only have one chance to catch it, so save beforehand and turn off Autosave. As Diancie is very hard to catch and appears in a cave, it is recommended to purchase a lot of Dusk Balls in Poké Ball Emporium, Anthian City - Shopping District before actually proceeding to fight Diancie.


Wild Pokémon

All Wild Pokémon are the same as those on Route 13.

Note: Rarity levels are estimations according to this scale and might be subject to changes due to different encounter assessment results, unless supported by official encounter rates, which are listed in red under the rarity level if known.

Pokémon Type Image Rarity Items EV Yield
Walking Cave Lv. 32-36
Foongus XY
CommonTiny MushroomBig Mushroom1 HP
Tangela XY
CommonNone1 Def
Duosion XY
UncommonNone2 Sp. Atk
Volbeat XY
UncommonBright Powder1 Speed
Illumise XY
UncommonBright Powder1 Speed
Joltik XY
RareNone1 Speed
Tynamo XY
Very Rare
1/70 (Appr. 1.43%)
None1 Speed
Click on the Pokémon names to check their learnsets on Bulbapedia. All Pokémon follow their movesets in Pokémon Sun and Moon. Hover on the item sprites to check the exact chance of being held by the Wild Pokémon. All information above only applies to the Normal Adventure Mode.

Roaming Pokémon are not listed in the table above. They are fixed at Lv. 40 and have a 0.1% chance of appearing anywhere in Roria with wild encounter methods specified here.

Set Encounter

Warning: Players can only battle the following Pokémon once! Save beforehand and turn off Autosave.

Pokémon Type Level Image Rarity Item EV Yield
Mythical Pokémon
Quick BallDusk BallTimer Ball
Lv. 40
Diancie XY
One OnlyNone1 Def
2 Sp. Def
If attempts of catching the above Pokémon failed, immediately leave the game and rejoin without saving, in order to secure a second chance.

Click on the Pokémon names to check their learnsets on Bulbapedia. All Pokémon above follow their movesets in Pokémon Sun and Moon. Hover on the item sprites to check the exact chance of being held by the Set Encounter Pokémon.

Towns Mitis TownCheshma TownLagoona Lake (Trenches) • Port Decca (Beach) • Crescent TownHaunted Badge
Cities Silvent CityArc BadgeBrimber CityBrimstone BadgeRosecove CityFloat Badge (Beach) • Anthian City (Housing Dist.Shopping Dist.Battle Dist.Soaring BadgeParkSewer) • Aredia CityCrater Badge (Old ArediaAredia Ruins) • Fluoruma CityHarvest BadgeFrostveil CityContrast Badge (Catacombs)
Routes 123456789101112131415161718
Caves &
Glistening GrottoSteam ChamberMt. Igneus (Igneus Depths) • Path of TruthSilver CoveMt. Cragonos (MinesCliffsPeakSanctuarySpringChamber of the Jewel) • Desert CatacombsNature's DenCalcite ChamberMartensite ChamberDendrite ChamberTitans' ThrongFreezing FissureOcean's OriginAborille Outpost (Demon's Tomb)
Islands Crescent Island (TownAborille Outpost) • Lost Islands (Deep Jungle) • Voltridia Island (Cavern) • Frigidia Island (Cavern) • Obsidia Island (Cavern)
Gale ForestOld GraveyardSecret GroveGrove of DreamsFortulose ManorCosmeos Valley (Observatory) • Tinbell Tower (Construction Site) • Secret LabSafari ZoneEclipse BaseGene Lab
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