Where To Get Prism Scale Brilliant Diamond

Obtaining the Prism Scale in Pokémon Brilliant Diamond
The Prism Scale is a crucial evolution item in Pokémon Brilliant Diamond, required to evolve Feebas into Milotic. This article details the confirmed and reliable methods for acquiring the Prism Scale in the game.
Mount Coronet Encounter
The primary and most consistent method to obtain a Prism Scale involves exploring Mount Coronet. The item is located within the cave system, specifically accessible after obtaining the National Pokédex. This requirement is important to note, as access to certain areas within Mount Coronet is gated until the post-game content is unlocked.
To reach the specific location of the Prism Scale, the following steps should be followed:
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Step 1: Enter Mount Coronet from the Route 216 entrance (near Snowpoint City). Ensure you have Pokémon capable of using HM/TM moves like Rock Climb and Surf.
Step 2: Navigate through the initial cave sections, utilizing Rock Climb to ascend to higher platforms. Your objective is to reach the upper levels of the mountain’s interior.
Step 3: Once you are on an upper level, search for a pool of water. Use Surf to traverse this water body. The Prism Scale is typically found as a hidden item in this pool or nearby, often requiring the use of the Dowsing Machine app on the Pokétch.
It is important to emphasize that the Prism Scale in this location is a hidden item, meaning it will not be visible on the ground. Players must actively search the area using the Dowsing Machine to detect its presence. Be thorough in exploring every tile near the water's edge.
Held Item on Wild Pokémon
While significantly rarer than the Mount Coronet method, a Prism Scale can occasionally be found as a held item on wild Feebas. This acquisition method is less reliable due to the low probability of both encountering a Feebas and it holding the item.
The following points should be considered:

Feebas Location: Feebas can only be found on Route 209, specifically within Mt. Coronet's interior lake. Only six specific tiles within this lake will yield Feebas encounters.
Encounter Rate: The encounter rate for Feebas is extremely low, estimated to be around 5% on the designated tiles.
Held Item Chance: Even if a Feebas is encountered, the probability of it holding a Prism Scale is also very low, estimated at around 5%.
Given these probabilities, relying solely on this method is not recommended. However, players specifically fishing for Feebas might consider using a Pokémon with the ability Compound Eyes in the first slot of their party. Compound Eyes increases the chance of encountering a Pokémon holding an item. Additionally, a Pokémon with the move Thief or the ability Frisk can be used to steal or check for held items without defeating the Feebas.
Pokémon Hideaways in the Grand Underground
Another potential source for the Prism Scale is within Pokémon Hideaways located in the Grand Underground. Specifically, large bodies of water within the Grand Underground, accessed after obtaining the National Dex, may contain hidden items. These items can include evolution stones, shards, and occasionally, the Prism Scale.
The following factors influence the success of this method:

Post-Game Requirement: Similar to the Mount Coronet location, accessing the relevant areas in the Grand Underground with higher-level Pokémon spawns and better item drops requires the National Pokédex.
RNG Factor: The items found in the Grand Underground are randomly generated. There is no guarantee that a Prism Scale will be available on any given day or in any specific location.
Exploration: Players should systematically explore the larger water-filled hideaways in the Grand Underground, using the Dowsing Machine app to search for hidden items.
While not as targeted as the Mount Coronet location, regular exploration of the Grand Underground can yield a Prism Scale as a byproduct of other activities, such as Pokémon training and resource gathering.
Trading with Other Players
An alternative, though dependent on external factors, is trading with other players. If another player possesses a spare Prism Scale, they may be willing to trade it for another item or Pokémon. Online trading functionalities are available within Pokémon Brilliant Diamond, allowing players to connect and exchange items remotely.
Consider these points when pursuing trades:

Trust and Security: Exercise caution when trading with unfamiliar players online. Ensure the terms of the trade are clearly agreed upon before committing.
Value Assessment: Understand the value of the Prism Scale and the item or Pokémon you are offering in return. Research online to determine fair market prices.
Trading Communities: Explore online forums and communities dedicated to Pokémon Brilliant Diamond. These platforms can facilitate finding reliable trading partners.
While trading provides a direct and potentially faster way to acquire a Prism Scale, it relies on the availability and willingness of other players.
Mystery Gift and Promotional Events
Although not a consistent method, Nintendo occasionally distributes items through Mystery Gift events. It is conceivable that a Prism Scale could be offered as a promotional item during a special event. However, this is unpredictable and cannot be relied upon as a primary acquisition method.
To stay informed about potential Mystery Gift distributions, the following steps are recommended:

Official Nintendo Channels: Monitor official Nintendo websites and social media accounts for announcements regarding Pokémon games.
Pokémon News Outlets: Follow reputable Pokémon news websites and content creators for updates on in-game events and promotions.
While not a guaranteed method, keeping an eye on official channels may occasionally provide an opportunity to obtain a Prism Scale through a Mystery Gift.
Conclusion
The most reliable method for obtaining a Prism Scale in Pokémon Brilliant Diamond is through exploration of Mount Coronet, specifically the pool of water accessible after obtaining the National Pokédex. While other methods, such as finding it as a held item on wild Feebas, exploring the Grand Underground, trading with other players, and potential Mystery Gift distributions exist, they are significantly less consistent or dependent on external factors.
Key Takeaways:
- Mount Coronet is the primary source.
- The National Pokédex is required for key areas.
- Use the Dowsing Machine to find hidden items.
- Wild Feebas and Grand Underground finds are rare.
- Trading can be a viable alternative.
By focusing on the Mount Coronet method and supplementing it with occasional exploration in the Grand Underground, players can maximize their chances of acquiring a Prism Scale and evolving their Feebas into Milotic.
