This page offers a guide on how to unlock and complete Request 90: The Pearl Clan’s Treasure in Pokémon Legends: ARCEUS (PLA).
Request 90: The Pearl Clan's Treasure.
You can only access this request once you’ve completed the main story. Once you’ve done so, you’ll find Irida at Pearl Settlement in Alabaster Icelands. She’ll challenge you to a battle!
How to Beat Irida
Irida will send out three level 64 
Eevee evolutions: 
Flareon, 
Espeon and 
Glaceon. 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 Irida’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 horrendously challenging so bringing a few high-levelled hard hitters will likely be sufficient. For example, 
Palkia and 
Dialga, whom you should have access to at this stage in the game, will be pretty good for high damage and overall tankiness.
Glaceon Effectiveness
Glaceon is the 
type evolution of Eevee.
Glaceon Resistances
| Resistance | Type |
|---|---|
| Takes half damage (x0.5) | |
| Takes quarter (x0.25) damage | – |
| Takes no damage (immunity) | – |
Glaceon Weaknesses
| Weakness | Type |
|---|---|
| Takes double (x2) damage |     |
| Takes quadruple (x4) damage | – |
Flareon Effectiveness
Flareon is the type evolution of Eevee.
Flareon Resistances
| Resistance | Type |
|---|---|
| Takes half damage (x0.5) |    |
| Takes quarter (x0.25) damage | – |
| Takes no damage (immunity) | – |
Flareon Weaknesses
| Weakness | Type |
|---|---|
| Takes double (x2) damage |   |
| Takes quadruple (x4) damage | – |
Espeon Effectiveness
Espeon is the 
type evolution of Eevee.
Espeon Resistances
| Resistance | Type |
|---|---|
| Takes half damage (x0.5) | |
| Takes quarter (x0.25) damage | – |
| Takes no damage (immunity) | – |
Espeon Weaknesses
| Weakness | Type |
|---|---|
| Takes double (x2) damage |   |
| Takes quadruple (x4) damage | – |
Irida Battle Reward
Once you’ve defeated Irida’s Eevee Evolutions, you’ll be rewarded with x1 Lustrous Globe and x3 Comet Shard. The Lustrous Globe is used to change Palkia’s form!
Use the Lustrous Globe on Palkia to transform him!
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