Legendary Caverns (lake trio)

The Secret Legendary Lake Caverns are a daily challenge at Sinnoh’s three lakes. Each run is a maze with five trainers, followed by a battle against the lake’s legendary Pokémon: Uxie, Mesprit or Azelf.

Every win gives Blaze Coins and an item, and sometimes the lake guardian’s core. You can craft the core into a box that lets you battle and catch that legendary.

A battle against Uxie with its HP bar shown at the top of the screen. — The lake guardians are only level 70, but their HP is enormous.

Which lake is open

Each player has their own rotation, always in this order:

Lake Acuity (Uxie), near Snowpoint City
Lake Verity (Mesprit), near Twinleaf Town
Lake Valor (Azelf), reached from Valor Lakefront

Your first run is always at Lake Acuity. After you win a run, the next lake in the list opens the following day (after midnight UTC).

If you lose or give up, you can try the same lake again, on the same day or later, until you beat it. The Ancient Man at the wrong lake will not let you in.

Each lake has a small cave entrance on its shore. The Ancient Man stands inside.

**Lake Acuity**Your first run starts here.Wild Pokémon here

**Acuity Cavern**The Ancient Man for the Uxie run.

How a run works

Talk to the Ancient Man. He is in the lake’s cavern. Agree to enter, and you are sent into the lake’s labyrinth.

Talk to the Ancient Man inside the lake's cavern to start a run.
Find and beat the five trainers. The maze layout is picked at random for each run. Each trainer has six random Pokémon.

Their level matches your highest-level party Pokémon, but never below level 70 or above level 100. If you lose to a trainer, you are sent back to your last Pokémon Center and have to start the maze again from the Ancient Man.

Each Legendary Caverns run builds a new maze with five trainers.
Heal carefully. There is no automatic healing between battles, and Revives cannot be used in these battles.

You can use other healing items from your bag, or talk to the healer at the bottom of the maze. Using the healer lowers your chance of getting the legendary core at the end, so heal with items when you can.
Take the warp to the boss. Once all five trainers are beaten, the NPC at the top of the maze warps you to the legendary’s chamber.

Uxie CavernUxie Cavern, the boss chamber of the Lake Acuity run.
Defeat the legendary. Uxie, Mesprit and Azelf are level 70, but their HP is far higher than normal.

Bring Pokémon that can deal steady damage over a long fight, and status or chip damage helps. Revives are blocked here too. If you lose, you are sent back to your last Pokémon Center.

Rewards

Every win gives Blaze Coinx5 and one of these:

Group	Items
Training items	Ability Patch, Ability Capsule, PP Up, IV Randomizer, IV Potion
Valuables	Pearl String, Star Piece
TMs	TM059 Zen Headbutt, TM063 Psychic Fangs, TM085 Rest, TM120 Psychic, TM138 Psychic Terrain, TM139 Misty Terrain, TM161 Trick Room, TM218 Expanding Force, TM227 Alluring Voice
Held items	Twisted Spoon, Mind Plate, Wise Glasses, Permanent Room Service
Legendary core	Knowledge Core (Uxie), Emotion Core (Mesprit) or Will Core (Azelf)

The core is not guaranteed on every win. It is the item that matters if you want to catch a lake guardian.

Crafting a lake guardian box

Each core is a crafting ingredient for a box that starts a wild battle with that legendary, which you can then catch. The recipes need crafting level 10 and 10,000 F:

Box	Ingredients
Uxie Box	Knowledge Core, Mind Plate, Wise Glasses, Star Piece
Mesprit Box	Emotion Core, Pearl String, Star Piece, Twisted Spoon
Azelf Box	Will Core, Ability Capsule, PP Up, Mind Plate