If you've been playing Pokemon Legends: Z-A and have been waiting to add the mythical jewel Pokemon Diancie to your team, this guide will show you exactly how to do it. It's a short, event-based process, but there are a few specific steps you need to follow to unlock both Diancie and its Mega Evolution.

Diancie first appeared in Pokemon X and Y as an exclusive event Pokemon. In Pokemon Legends: Z-A, the Pokemon Company has brought it back through a new in-game side mission called “Shine Bright like a Gemstone.” This mission is unlocked through the Mystery Gift system and allows players not only to obtain Diancie but also to Mega Evolve it using the Diancite stone.
It's a nice reward for players who have already completed the main story, offering a reason to jump back into the game and explore post-game content.
Step 1: Finish the Main Story
Before the event can trigger, make sure you've completed the main storyline of Pokemon Legends: Z-A (or the Nintendo Switch 2 Edition). The extra mission only appears once you've finished the story.
Step 2: Claim the Diancite via Mystery Gift
After completing the story, go to your in-game menu, select Link Play → Mystery Gift → Get via Internet, and claim the Diancite stone. You'll need to have your Nintendo Switch connected to the internet and linked to a Nintendo Account. It may take about an hour of total playtime before Mystery Gift becomes available.
Step 3: Check Your Satchel
Once you've received the Diancite, open your Satchel and check the Mega Stones section to confirm that it's been added to your inventory. This item will be the key to triggering the next step.
Step 4: Visit the Looker Bureau
Head to the Looker Bureau in Lumiose City (or the main hub area). There you'll find Mimi, an Espurr that belongs to Emma. When Mimi notices your Diancite stone, it'll start the special side mission “Shine Bright like a Gemstone.”
Step 5: Complete the Mission
Follow the quest's objectives and complete the tasks given by Mimi and the Looker Bureau. When you finish the mission, Diancie will join your team as a reward.
Step 6: Mega Evolve Diancie
Once you've obtained Diancie, you can use the Diancite stone in battle to Mega Evolve it into Mega Diancie, transforming it into one of the most elegant and powerful Rock/Fairy Pokemon in the game.
If you enjoy collecting rare Mythical Pokemon like Diancie, you'll definitely love expanding your roster with exclusive variants. For an even greater challenge and sparkle, you can buy Shiny Alpha Pokemon from U4GM to complete your perfect team lineup.
Getting Diancie in Pokemon Legends: Z-A isn't difficult, but it's a sequence that depends on completing specific steps in order. Once you've claimed the Diancite through Mystery Gift, talk to Mimi at the Looker Bureau, complete the mission, and enjoy adding Diancie to your collection.
It's a small but exciting event that rewards dedicated players with a Mythical Pokemon and one of the most stunning Mega Evolutions in the series. If you're a completionist or just love collecting rare Pokemon, don't delay—claim your Diancite before the event ends and let your team shine bright like a gemstone.