This is not should be like that!

Part 1: Link

After journey with your Diancie you become like best friend each other who can both trust each other. However, there a mysterious guy with his henchmen who are just want to destroy your Diancie.

However, by the strong boundaries with your Diancie you can mega evolve you Diancie using your mega ring and boundaries. Congratulations! :D

Your chance to defeat this mysterious guy with his henchmens are very low, because they are know weaknesses of your Diancie. Even if you will mega evolve your Diancie to Mega Diancie, it's still impossible. But if you will run away, than don't worry... another of their pokemon are faster than you and your Diancie...

[SPOILER: Explanation (Goal + Revive)]

This mysterious guy it's a beginner villain, but knows his tactics and tricks better than you, but his goal it's to eliminate all trainer's pokemons, which looks powerful and can in future make problems for him. You are great target since you have Diancie, so his task it's just break Diancie on pieces.

If you will take you dead Diancie by her main pieces and her body, then just run away with her... Your mind will lead you where you should go if you are focused to bring your friend back