Premiere: Japan - 19th July 2014   |   U.S - 8th November 2014

Home Video: Japan - 17th December 2014   |   U.S - 17th February 2015

English Themes: Opening - Pokemon Theme (XY Version)

                            Ending - Open My Eyes

Diancie & the Cocoon of Destruction

- 'New' Characters: Argus Steel, Millis Steel, Merilyn, Riot, Astrid, Diantha, Wikstrom, Uschi

*ARGUS STEEL

 Gender Male
 Hometown Unknown
 Relatives Millis Steel (Daughter)  
 Region
Kalos
 English Voice Actor
 Pete Zarustica
 Japanese Voice Actor
 Reiji Nakagawa
Anime Debut
Diancie & the Cocoon of Destruction

Argus Steel first appeared in the 17th movie, tracking Diancie from his airship. Argus was competing against Merilyn and Riot to find Diancie, but his techniques have a stealthy manner. At the time of release, Millis Steel is his only known relation.

Argus' Pokemon: Honedge, Doublade and Aegislash (all voiced by Tom Wayland), none of their moves are known.

*MILLIS STEEL

 Gender
 Female
 Hometown Unknown
 Region Kalos
 Relatives Argus Steel (Father)
 English Voice Actor
 Brittany Lee Hamilton
 Japanese Voice Actor
 Shoko Nakagawa
Anime Debut
 Diancie & the Cocoon of Destruction

Millis Steel appears in the 17th movie, as Argus Steel's daughter. Also known for her stealthiness, as she is very good at staying hidden when being tracked.

Millis' Pokemon: Chesnaught - Chesnaught's known moves are pin missile, vine whip and spiky shield. He is also confirmed Male, in the English dub only. (Voice actor unknown). Millis also borrowed her father's Honedge and Doublade.

*MERILYN

 Gender
 Female
 Hometown Unknown
 Region
 Kalos
 English Voice Actor
 Lianne Marie Dobbs
 Japanese Voice Actor
 Rika Adachi
Anime Debut
 Diancie & the Cocoon of Destruction
 

Merilyn first appeared in the 17th movie when she had her Delphox prevent Diancie from getting away in Avignon Town. She pursued Diancie, as Diancie was searching for Xerneas. Her's and Riot's attacks were loud enough that Ash could hear them and raced to see what was going on. As Merilyn was about to unleash her Delphox again, Ash appeared and Pikachu thunderbolted her Delphox and Riot's Greninja. The impact of Pikachu's attack caused them both to leave. She was then seen on Argus Steel's computer when he was watching footage. Later, while Ash and his friends are in Orsay City, Merilyn finds them by the water fountain. Ash keeps her busy with Froakie while the group run off with Diancie. She meets up with Riot and Millis, where Millis distracts them long enough for the group to escape. 

Merilyn was shown to be an ambitious thief who relentlessly hunted Diancie with her Delphox. She was shown to also compete harsly with Riot and the Steels in doing so. She was seen getting more competitive with Riot, as they were both actively hunting Diancie, compared to the Steels who waited in patience. She also spoke a lot, telling Ash that she needed Diancie's diamonds, this trait caused Riot to call her a "master blabbermouth". Although Merilyn seems to be hostile towards Riot at first, it's later shown that she has romantic feelings for him. This was shown when Merilyn kissed him after they were revived by Xerneas' Geomancy and when Riot proposed.

In the credits of the film, it shows Merilyn working in a clothing shop, having given up her life as a jewel thief. Riot visits her at the shop and proposes. 

 Merilyn's Pokemon:  Delphox - Delphox is Merilyn's main Pokemon and it's known moves are flamethrower, mystical fire and flame charge.

Yanmega - At this time, NONE of Yanmega's moves are known. 

(Voice actors for both Pokemon are unknown)

*RIOT

 Gender Male
 Hometown Unknown
 Region Kalos
 English Voice Actor
 Marc Thompson
 Japanese Voice Actor
 Koichi Yamadera
Anime Debut
 Diancie & the Cocoon of Destruction
 

Riot is a ninja and a thief who works against his rivals; Merilyn, Argus and Millis, to capture Diancie and make a fortune through her ability to create diamons. After it received the power of the fairy aura from Xerneas, Riot and Merilyn attacked her in the Allearth Forest. However, Yveltal was awakened by the fighting and went on a rampage and turned Riot's Greninja and Ninjask to stone using Oblivion Wing. He later found Merilyn crying over the loss of her Delphox and Yanmega to Yveltal. Having a change of heart, her removes his mask and offers to comfort her. However, as she begins to accept his affection, Yveltal aims Oblivion Wing at them and they embrace shortly before being killed. They are later revived by Xerneas' Geomancy. Though he appeared to be initally hostile towards Merilyn it is later shown that he has romantic feelings for her, as she does for him. This was hinted at when Riot saved her from falling into the pool of water, and later when he was comforting her while she grieved the death of her Pokemon, telling her to forget about Diancie. His relationship with Merilyn was ultimately confirmed when he proposed to her.

Riot's Pokemon: Greninja - Greninja is Riot's main pokemon and it's known moves are water shurkien and double team. Ninjask (multiple) - At this time NONE of their moves are known.

*ASTRID

 Gender Female
 Eye Colour
 Lavender
 Hair Colour
 Blonde
 Hometown Unknown
 Region Kalos
 Trainer Class
 Trainer
 English Voice Actor
 Kate Bristol
 Japanese Voice Actor
 Miyuu Sawai
 Anime Debut
 Mega Evolution Special I
 

Astrid first debuted in the first Mega Evolution Special. She is a skilled trainer who possesses a key stone as well as an Absolite. She wears her key stone as an earring on her right ear. Astrid appeared again in Diancie and the Cocoon of Destruction, battling with Ash. After a fierce match, she won the battle using her Mega Absol. Afterwards, Bonnie tried to ask her to marry Clemont, but was quickly pulled away by her embarrassed big brother.

Astrid's Pokemon: Absol > Mega Absol - Absol is Astrid's main Pokemon, it is able to mega evolve into Mega Absol, with the help of Astrid's key stone and Absolite. It's known moves are; Psycho cut, megahorn, dark pulse and night slash. (Voice actors - English: Bill Rogers   Japanese: Hitomi Nabatame.) Pyroar (Male) - First Pokemon in battle against Ash. It's known moves are; flamethrower and fire fang. Meowstic (Female) - Second Pokemon used in battle against Ash. It's known moves are; Scratch and charge beam. (Voice actors are unknown)

*DIANTHA

 Gender Female
 Eye Colour
 Blue
 Hair Colour
 Brown
 Hometown Unknown
 Region Kalos
 Trainer Class
 Champion Grand Duchess
 Generation
 VI
 Games
 X and Y
 Champion of
 Pokemon League (Kalos)
 Anime Debut
 The Bonds of Evolution!
 English Voice Actor
Vanessa Gardner
 Japanese Voice Actor
 Fumiko Orikasa
 

Diantha makes an appearance in the movie where she is seen battling Wikstrom.

Diantha's only known Pokemon is Gardevoir. It is able to Mega Evolve into Mega Gardevoir. Gardevoir's known moves are shadow ball and moonblast.

*WIKSTROM

 Gender Male
 Eye Colour
 Blue
 Hair Colour
 Dull Brown
 Hometown Unknown
 Region Kalos
Trainer Class
 Elite Four Duke
 Generation
 VI
 Elite Four of
 Pokemon League (Kalos)
Specialises in
 Steel types
Anime Cameos
 Diancie & the Cocoon of Destruction
 

 Wikstrom debuted in the 17th movie as part of the 'World of Pokemon' intro. During his cameo, he was seen battling Diantha.

Wikstrom's Pokemon: Scizor - Scizor's only known move is night slash.

 TRIVIA -  Wikstrom is the first Elite Four member to appear in person in a Pokemon movie.

USCHI

 Gender Male
 Hometown Unknown
 Region Kalos
 Relatives None
 English Voice Actor
 Unknown
 Japanese Voice Actor
 Atsuto Uchida

 Uschi is a character in Diancie and the Cocoon of Destruction. He is unnamed in the English dub, simply referred to a shopper in the subtitles. He is a porter that bumps into Ash and his friends when they follow Diancie around the mall. He almost drops his load, but the others quickly grab them and return them to him. Uschi is based on Atsuto Uchida, a footballer who plays for the Japanese national team and participated in the 2014 FIFA World Cup, which was on course during the premiere of the film. Uchida himself also provided the voice for this character. A reference is made, when you see that he is carrying a soccer ball.

Uschi's Pokemon: Pikachu - Pikachu is Uschi's only Pokemon. This Pikachu is a reference to Japan's team in the 2014 FIFA World Cup, which had him as mascot.