Published Title Publisher
New Title Publisher
Updated Title
Published Title Score Editor's Choice
Published Title Score

Pokémon Legends: Arceus

Purchase on Amazon

Request 89: The Diamond Clan's Treasure

Seren Morgan-Roberts

This page offers a guide on how to unlock and complete Request 89: The Diamond Clan’s Treasure in Pokémon Legends: ARCEUS (PLA).

Request 89: The Diamond Clan's Treasure.

You can only access this request once you’ve completed the main story. Once you’ve done so, you’ll find Adaman on the northwest edge of Lake Valor, just northeast of Diamond Settlement in Crimson Mirelands. He’ll challenge you to a battle!

How to Beat Adaman

Adaman will send out three level 32 "Eevee" IconEevee evolutions: "Leafeon" IconLeafeon, "Umbreon" IconUmbreon and "Vaporeon" IconVaporeon. You’ll have to battle all three at once. Your best bet is to send out Pokémon who have moves at are effective against each of Adaman’s Pokémon, and defeat them one at a time. Below you’ll find tables of weaknesses and resistances for each one so you know which moves to utilise to your advantage and which to avoid.

It is important to note that you might bring out a Pokémon that’s super effective against one of the Eevee evolutions but is weak to one of the other Eevee evolution’s moves, meaning your Pokémon might get chunked or even one-shot. Make sure to bring potions and revives and plan your party accordingly! Luckily this fight isn’t challenging because his Eevee evolutions are a lot lower level than you should be around the end of the game (Around Level 50-70) so anything you send out will likely be of a higher level.

Vaporeon Effectiveness

Vaporeon is the pokemonbdspwater17.png type evolution of Eevee.

Vaporeon Resistances

Resistance Type
Takes half damage (x0.5) pokemonbdspwater17.png pokemonbdspice17.pngpokemonbdspfire17.pngpokemonbdspsteel17.png
Takes quarter (x0.25) damage
Takes no damage (immunity)

Vaporeon Weaknesses

Weakness Type
Takes double (x2) damage pokemonbdspgrass17.png pokemonbdspelectric17.png
Takes quadruple (x4) damage

Leafeon Effectiveness

Leafeon is the pokemonbdspgrass17.png type evolution of Eevee.

Leafeon Resistances

Resistance Type
Takes half damage (x0.5) pokemonbdspgrass17.png pokemonbdspelectric17.png pokemonbdspwater17.pngpokemonbdspground17.png
Takes quarter (x0.25) damage
Takes no damage (immunity)

Leafeon Weaknesses

Weakness Type
Takes double (x2) damage pokemonbdspice17.png pokemonbdsppoison17.pngpokemonbdspfire17.png pokemonbdspflying17.pngpokemonbdspbug17.png
Takes quadruple (x4) damage

Umbreon Effectiveness

Umbreon is the pokemonbdspdark17.png type evolution of Eevee.

Umbreon Resistances

Resistance Type
Takes half damage (x0.5) pokemonbdspghost17.png pokemonbdspdark17.png
Takes quarter (x0.25) damage
Takes no damage (immunity)

Umbreon Weaknesses

Weakness Type
Takes double (x2) damage pokemonbdspfairy17.pngpokemonbdspfighting17.png pokemonbdspbug17.png
Takes quadruple (x4) damage

Adaman Battle Reward

Once you’ve successfully defeated Adaman’s Eevee Evolutions, you’ll be rewarded x1 Adamant Crystal and x3 Comet Shard. The Adamant Crystal is used to change "Dialga" IconDialga’s form!

Adamant Crystal.

No Comments
Guide Information
  • Publisher
  • Platforms,
  • Genre
    Action RPG
  • Guide Release
    10 January 2022
  • Last Updated
    20 January 2024
    Version History
  • Guide Author

Share this free guide:

This guide for Pokémon Legends: Arceus currently includes the following:

Get a Gamer Guides Premium account: