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Pokémon Legends: Arceus

Mission 21: The Plate of the Lakes

By
Vincent Lau

This is a guide for Mission 21: “The Plate of the Lakes” in Pokémon Legends: Arceus (PLA).

How to Start Mission 21

(1 of 2) For this mission, you must catch the three lake guardians.

For this mission, you must catch the three lake guardians. (left), Yes, what better way to repay the guardians than to enslave, ahem, make them your friends. (right)

You’ll receive Mission 21 (along with four other missions) after speaking to Cogita as part of the postgame mission “The Researcher of Myths”. This mission is basically a repeat–and the conclusion–of the lake trials during the endgame. You must visit the three lakes of the Hisui region and catch the Legendary Pokémon there.

1. Head to the Island at Lake Verity

(1 of 2) As a reminder, Lake Verity is located towards the west.

As a reminder, Lake Verity is located towards the west. (left), Gliding from atop the Heights Camp is probably the most hassle-free way. (right)

To catch Mesprit, make your way to Lake Verity, which is located on the west side of Obsidian Fieldlands. We suggest entering via the Heights Camp (otherwise, fast-travel there), then gliding west on Braviary. Aim for the circular island in the center of the lake, then go inside the south-facing cave entrance.

Inside, Mesprit will immediately aggro. Throw a Pokémon at/near it to begin a battle.

Legendary Pokémon

(1 of 2) Mesprit is the balanced member of the trio.

Mesprit is the balanced member of the trio. (left), Recover makes Mesprit the hardest (most time-consuming) guardian to catch. (right)

Pokémon Level Type
Mesprit 70 pokemonplatypepsychic.png

Dark-types are highly recommended, to stop Mesprit using Extrasensory and Mystic Power, which boosts its offensive or defensive stats, depending on whichever is strongest. This will leave Mesprit with Swift as its only attacking move.

Surviving Mesprit is fairly simple; the tough part is Mesprit using Recover to keep restoring its HP. If you have access to moves that can paralyze or cause drowsiness (eg. Thunder Wave, Hypnosis), use them to try and stop Mesprit from acting.

Using False Swipe will be difficult here, what with Mesprit spamming Recover. Don’t worry about accidentally KOing Mesprit–if that happens, it will instantly respawn.

2. Head to the Island at Lake Valor

(1 of 2) Lake Valor, near the north-east corner.

Lake Valor, near the north-east corner. (left), If you want to glide from high up, begin from the Brava Arena. (right)

To catch Azelf, head over to Lake Valor, near the north-east corner of Crimson Mirelands. You could fast-travel to the Brava Arena, which is higher up, and glide east-south-east towards the lake. Or you could depart from the Diamond Settlement instead, which is closer but less exciting. Either way, land on the island in the lake’s center and enter the cave.

Inside the cave, Azelf will immediately aggro. Throw a Pokémon at/near it to begin a battle.

Legendary Pokémon

(1 of 2) Azelf favors offense.

Azelf favors offense. (left), Even without its Psychic moves, its Swift can do some decent damage. (right)

Pokémon Level Type
Azelf 70 pokemonplatypepsychic.png

As before, you’d do well to bring a Dark-type. Like Mesprit, Azelf can use Extrasensory and the lake guardians’ unique move Mystical Power, which boosts its offensive or defensive stats, whichever is better (offensive in this case).

Compared to Mesprit, Azelf is much easier to catch because it won’t use Recover. Instead, it can use Double Hit to temporarily boost its move damage by 50%. This will make its Swift hurt harder, but we’ll happily accept this trade off.

3. Head to the Island at Lake Acuity

(1 of 2) Brrr… Lake Acuity is located at the northern edge of Alabaster Icelands.

Brrr… Lake Acuity is located at the northern edge of Alabaster Icelands. (left), You can climb up near Snowpoint Temple, then glide across the water. (right)

To catch Uxie, travel to Lake Acuity at Alabaster Icelands. You could fast-travel to the Pearl Settlement and use Sneasler to climb up the northern cliff. When you reach the top, glide or swim west to the island in the middle of the lake. Then step inside the cave you previously visited.

Inside, Uxie will spot you immediately. Throw one of your Pokémon at/near it to initiate a battle.

Legendary Pokémon

(1 of 2) Uxie favors defense.

Uxie favors defense. (left), Hypnosis is a nuisance, but not too dangerous. (right)

Pokémon Level Type
Uxie 70 pokemonplatypepsychic.png

Again, Dark-types are ideal for this fight. Otherwise you’ll be assaulted by STAB Extrasensory and Mystical Power. Compared to the other guardians, Uxie excels in defense, so it won’t be sweeping your party. However Mystical Power will bulk up its defensive stats, making it a slog to weaken.

To further annoy you, Uxie can use Hypnosis to induce drowsiness, which will occasionally prevent your Pokémon from acting. If you want, you can cure it with Full Heals etc. But if you’ve already gotten Uxie’s HP down to red by that point, feel free to let your Pokémon nap.

(1 of 2) Your reward is the Draco Plate.

Your reward is the Draco Plate. (left), Onto the next plate! (right)

After successfully capturing the third lake guardian, you will receive the Draco Plate. This mission will then end.

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Guide Information

  • Publisher
    Nintendo
  • Platforms,
    Switch
  • Genre
    Action RPG
  • Guide Release
    10 January 2022
  • Last Updated
    18 March 2022
    Version History
  • Guide Author

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