How to Unlock Mega Diancie in Pokémon Legends: Z-A

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The latest update for Pokémon Legends: Z-A has introduced one of the most exciting additions to the game yet: Mega Diancie. With its elegant design and impressive stats, this Mythical Pokémon is quickly becoming a fan favorite. However, getting your hands on it isn’t as simple as claiming a Mystery Gift—you’ll need to complete a special side mission and prepare for a challenging post-game battle. Here’s a step-by-step breakdown of how to unlock and catch Mega Diancie, along with a few tips from my own experience.

Step 1: Claim the Diancite Mystery Gift

Right after starting a new playthrough, players can access the Mystery Gift system to claim the Diancite, the Mega Stone required for Diancie’s Mega Evolution.
To get it, simply unlock the Link Play feature in your menu (around one hour into the game), select Mystery Gifts → Get via Internet, and the Diancite will be sent directly to your bag.

Even though you can claim it early, you won’t be able to catch Diancie until the post-game. So, think of this as preparation for what’s to come later.

(If you’re already building your collection or want to prepare your roster for endgame challenges, this might also be a good time to buy shiny Pokémon Legends ZA options from trusted marketplaces like U4GM, where players often trade for rare event Pokémon.)

Step 2: Unlock the “Shine Bright Like a Gemstone” Mission

Once you’ve completed the main story—specifically Main Mission 38: The Future of Lumiose—you’ll notice a new side mission marker on your map at the Looker Bureau. This marks the beginning of the event quest “Shine Bright Like a Gemstone.”

Head to the bureau and talk to Emma and her partner Pokémon, Mimi the Espurr. Something about your newly acquired Diancite seems to disturb Mimi, prompting Emma to investigate. From there, you’ll follow Emma and Mimi across Lumiose City as they chase mysterious energy readings tied to Mega Evolution.

It’s a short but memorable mission, with a few neat lore reveals about Emma Labro and her connection to the city’s strange Mega phenomena. While I won’t spoil the full story, it’s definitely worth playing through for the atmosphere alone.

Step 3: Prepare for the Rooftop Battle

The quest culminates in Magenta Sector 8, where you’ll find yourself on a rooftop scattered with glowing Mega Shards. Before starting the encounter, make sure to clear out the shards—they can interfere with targeting during battle.

Once cleared, you’ll face off against two Carbink and finally, Diancie itself.

• Carbink level: 64

• Diancie level: 70

This is a tough fight, especially if your team isn’t balanced or under-leveled. I recommend bringing Steel- or Ground-type Pokémon with strong, accurate moves to weaken Diancie without knocking it out.

Make sure to stock up on Poké Balls as well—many players, myself included, found the catch rate surprisingly low. Some used Heal Balls for the aesthetic match, while others stuck to Ultra Balls for reliability.

Step 4: Catch and Evolve Your Diancie

Once you finally catch Diancie (it took me six attempts!), you’ll unlock a short cutscene with Emma and Mimi, offering a few cryptic hints about Mega Evolution and possibly future DLC content.

Your Diancie will come with three guaranteed perfect IVs, a random nature, and your trainer’s name as its OT. Unfortunately, it is shiny-locked, meaning no matter how many times you retry, you won’t encounter a shiny version here.

After completing the quest, you’ll also receive 10,000 Poké Dollars and one XL Candy as rewards. Finally, just attach the Diancite to your Diancie and watch it Mega Evolve in battle—its transformation animation is easily one of the most stunning in the game.

Step 5: Bonus Tips and Future Prospects

Catching Mega Diancie is just one piece of the puzzle when it comes to preparing for Z-A’s evolving meta. With rumors surrounding the upcoming Mega Dimension DLC, there’s a good chance we’ll see even more Mythical Pokémon gain Mega forms.

For players looking to strengthen their roster quickly, Pokémon Legends ZA buy Pokémon listings on sites like U4GM are a convenient way to fill gaps or test team setups before major content drops. Just make sure any trades or exchanges follow the game’s terms and fair-play policies.

Mega Diancie isn’t just another collectible—it’s a beautifully designed Mythical with solid combat potential and fascinating lore ties to Lumiose City. The side quest leading to it is one of the more rewarding experiences in Pokémon Legends: Z-A, blending story, challenge, and nostalgia into a single well-crafted mission.