PS437

The Final Dimensional Duel VII (Japanese: 異次元決戦VII Different Dimension Battle VII), titled Alternate Dimension Showdown VII in the Chuang Yi translation, is the 437th chapter of the Pokémon Adventures manga, and the 21st chapter of the .
It is subtitled The World of Antimatter (Japanese: 反物質の世界 Antimatter World) in the VIZ Media translation and Antimatter World in the Chuang Yi translation.
==Plot==
Continuing their , Mira faces Saturn, while Cheryl battles Mars, and Marley battles Jupiter. Saturn's Toxicroak attacks with her knuckle claw, but Mira's blocks it with its spoon and uses . A confused Saturn points out that Mira is just switching her Alakazam's Attack and Defense stats. Mira follows up by having Alakazam use , which Saturn notes is swapping its Special Defense with its Defense stat; this confuses Saturn, as this removes the advantage a Pokémon has against his . Saturn questions Mira about this, while simultaneously attacking with . In her head, Mira reveals that she intends to draw out their battle and wants to make sure Saturn won't be able to deal much damage.
On Mars's side, she commands her to attack Cheryl's with . Blissey attempts to recover some of her health with a Berry, but Yanmega steals and eats the Berry with . Cheryl counters this by having Blissey to put Yanmega to . Mars switches for her and prevents Blissey from healing herself with .
On Jupiter's side, she attacks Marley's with an , which recognizes instantly. Jupiter hands a Durin Berry and has it use a Natural Gift to attack Arcanine. When Marley wonders how the move could be a different type, Platinum throws her a Vs. Recorder. Marley checks the Vs. Recorder and figures out something. Jupiter has Tangrowth use a Natural Gift with a Hondew Berry, but Marley manages to get Arcanine to dodge the attack. Jupiter prepares a Magost Berry for a Natural Gift, but Marley manages to get her Arcanine to dodge the falling rocks.
Jupiter realizes that Marley is now predicting her attacks. Palmer asks Platinum what she handed to Marley. Platinum reveals to Palmer that she lost to Jupiter and her Tangrowth's Natural Gift before. Since then, she figured out the secret to the attack and recorded it on her Vs. Recorder. She adds that with a Rawst Berry, the move's type changes to , but with a Lum Berry, the move deals damage. Palmer notes that there is also change its type an item. Before he can think about this any further, something appears and tackles him away. The Advanced level Grunt takes note of the thing that knocked Palmer away and realizes that the assailant is .
Elsewhere, examines his surroundings and realizes that he has wound up in the Distortion World. A voice from above asks Diamond how he knows that he's in the Distortion World. Diamond answers by stating that it's because this is the third time he's touched it. The first was when Paka and Uji were sucked inside of it, the second is when he and tried to jump into it at the Spear Pillar, and the third was just a short while ago when he took 's attack. The voice assumes that because he came in contact with it so many times, it gave Diamond a sort of connection towards the Distortion World. Diamond agrees with the voice and turns towards it, revealing it to be Cyrus.
Meanwhile, , the Pokémon Association Chairman, and Dr. Footstep arrive at Turnback Cave. Pearl immediately rushes in to meet up with Platinum. The Chairman follows suit and tells Dr. Footstep to stop getting distracted by the footprints. Back in the Distortion World, Diamond asks Cyrus how to counter Giratina.
==Major events==
* Mira, Cheryl, and Marley continue to battle Saturn, Mars, and Jupiter.
* Palmer is attacked by .
* finds Cyrus in the Distortion World.
* , the Sinnoh Pokémon Association Chairman, and Dr. Footstep arrive at Turnback Cave and go inside.
===Debuts===
====Pokémon debuts====
==Characters==
===Humans===
* 
* 
* 
* Palmer
* Cyrus
* Mars
* Saturn
* Jupiter
* Marley
* Mira
* Cheryl
* Advanced level Grunt
* Sinnoh Pokémon Association Chairman
* Dr. Footstep
===Pokémon===
* (Moo; 's; flashback)
* (Mars's)
* (Mars's)
* (Jupiter's)
* ()
* (Mira's)
* (Cheryl's)
* (Marley's)
* 
* ()
* (; fantasy) 
==In other languages==
de:Finale in der anderen Dimension VII
es:PMS437
fr:Chapitre 437 (Pocket Monsters Special)
it:LGA437
zh:宝可梦特别篇 第437话