Dian

Biodata

Feature	Value
Name	Dian (殿君); also rendered as Yingyue Dian and Eaglem Moon Dian 451 523.
Alias(es)	Battle Ghost; Sincerity / Zhencheng, his research alias; addressed as Scholar Yingyue 261 262 451 476.
Species/Race	Human, with memories of another world 620.
Gender	Male; experiences an unexplained transformation into a female body 619 621.
Affiliation	Pokémon Ranger Union; Kanto League; Qinan Gym. Works with the Dream Research Institute and receives a temporary Unova League inspector appointment 259 312 337 445 448.
Occupation/Role	Pokémon Trainer, Pokémon Ranger, Qinan City Gym Leader, researcher specializing in Pokémon Abilities, and entrepreneur 276 286 448.
Origin	Identified as being from Johto; his memories of his original world gradually fade 339 620.
First Pokémon	Misdreavus 339.
Documented Rank	Hall level, reached following his battle with Tobias; this does not establish an Elite Four appointment 572.
Status	Alive and active; later battles Ash after Ash wins the Sinnoh League 709.
Base of Operations	Maintains an underground laboratory on Decolora’s main island 648.

Power Progression

Dian’s documented growth includes both his own Trainer standing and breakthroughs achieved by his Pokémon.

Stage / Realm / Level	Chapter	Notes
Beedrill evolution	12	Kakuna evolves during Tomoya’s Blaze-enhanced attack and defeats Cyndaquil. Dian discovers that Beedrill already knows Swords Dance.
Toxin-enhanced physical development	21	Beedrill’s venom becomes capable of corroding solid wood, its body strengthens, and Swords Dance becomes easier to use. Coelacanth Grass subsequently stops producing observable gains.
Slightly above an ordinary Trainer	145	Chinami judges Dian only somewhat stronger than an ordinary Trainer and remains considerably stronger than him.
Academy-trained specialist	173	Nearly six months of study improve his training knowledge and Pokéblock production, reducing his dependence on his internal data Pokédex.
Tyranitar available	401	Pupitar has evolved by this point. Dian trains Tyranitar to perceive vibrations and develop finer control of Ground-type power. The evolution itself is not shown in the supplied passages.
Beedrill’s Nightmare Form	438	Bodily enhancement, Swarm development, Move Theory, and Nightmare Power support a third-Swords-Dance-level breakthrough. Beedrill cannot leave the form, making its unknown cost an urgent concern.
Improved Mega Evolution control	450	Dian credits Mental Power training with helping him master Mega Evolution rather than relying on desperate bursts during emergencies.
Elite-like type conversion	459	His victorious exhibition against Robert includes a “Grass-to-Ice” technique described as faintly Elite-level, demonstrating progress rather than a confirmed Elite rank.
Serperior evolution	476	Dian helps the newly evolved Serperior settle its emotions and control its increased power.
Controlled energy enhancement for Misdreavus	520	Experiments on a Substitute produce a method combining dark power and Mega Evolution energy. An infused Everstone lets Misdreavus absorb the prepared energy gradually.
Hall level	572	Dian states that he reached this level after battling Tobias. He then overwhelmingly defeats Tabitha’s coordinated three-Pokémon attack.
Transformed Misdreavus	709	Misdreavus draws on the Spirit World and uses Black Hole, defeating Ash’s Torterra, Sceptile, Heracross, Glalie, and Swellow in their post-tournament match.

Background and History

Early travels in Johto

Dian begins the supplied account traveling through Johto with knowledge of Pokémon games and familiar figures such as Ash, but an unreliable memory of local geography. In Tani City, even nearby place names are unfamiliar to him 5.

His early battles are closely tied to survival and food expenses. Defeating Tomoya earns him the Pokéblocks in his opponent’s backpack, while Beedrill’s evolution gives him a new partner around whom to build a training system. He subsequently develops toxin-based conditioning and investigates how moves grow out of shared foundations 12 21 126.

Napolant and the Ranger Academy

Exploration of Napolant’s ruins draws Dian into the affairs of its restoration faction. He obtains Honedge and a mysterious blue jewel; the jewel fastens itself around his neck, resists removal, and causes visions connected to the lost kingdom. Later, it resonates while Leika and Belia activate machinery in another ruin 94 99 181 182.

Dian also works with Chinami to pursue Pokémon Hunter Aaron Liang, explaining that Aaron possessed a rare Pokémon Egg. By their subsequent journey, Larvitar is traveling with him. Lorelei recommends Dian to the Ranger Academy, where Principal Ramo investigates his background before accepting him as a future student 158 159 171.

Academy study develops Dian into a more independent specialist. His paper on Ability inheritance and transformation receives partial validation, bringing research income and a foothold in academia. He also plans a joint paper with researcher Sega 173 174.

Alto Mare

After completing an assignment with help from an Octillery he had previously released, Dian visits Alto Mare. His interest in the city becomes entangled with Napolant’s restoration plans, the Soul Dew, and the cathedral’s machinery 182 187.

Rossi attempts to turn Ash’s group against him using a fabricated recording of a Soul Dew theft. Dian responds by calling Chinami rather than immediately battling. He later identifies the person acting through Rossi as Belia and recognizes Manaphy’s Heart Swap as the mechanism involved 192 194.

Hoenn’s desert and Mirazu Kingdom

Traveling with Yue Jifei, Dian investigates Mirage Tower and encounters Team Magma. He exposes Bannai’s impersonation of Professor Tenben and identifies Courtney as Karen, then falsely implies that she is a spy to undermine trust between the two operatives 220 259 261 262.

The desert journey also advances his research into Sandy Crystals and simulated dual Abilities. His financial activities are less scrupulous: he secretly removes the Stardust Sea’s valuable material and plans to sell fossils through Courtney’s research identity 252 268.

The Ranger Union assigns him to return Princess Sarah safely to Mirazu. After the succession crisis, he has Han Zuo secretly sent abroad. Yue leaves for Kalos with Sarah, taking Aggron and Teddiursa into her care, while Dian chooses to continue his own work 268 281.

Research partnerships and the Diamond Domain

Dian’s association with Fennel becomes both professional and personal. When Hunter J abducts Amaura Lulu, Fennel, and Truffle, he accepts a temporary Unova League inspector appointment to obtain intelligence and participate in the response 312.

In Kalos, he leaves a specially prepared Pokédex as bait for Diancie, hoping to establish diamond trading with the Diamond Domain without surrendering control of his company or patents. The encounter leads him to the Heart Diamond and leaves him with a small pink shard 331 332 334.

Latias subsequently rescues him and restores missing memories. She explains that several legendary powers have marked him: Celebi’s aura is masking Darkrai’s interest, while his previous actions have attracted Zygarde, Xerneas, and Yveltal. She advises him to leave Kalos 334.

Time displacement and Nightmare Power

Tomoko’s claim that Dian has already been dead for years prompts him to investigate possible connections among Celebi, the Mirror World, and the Battle of the Sevii Islands. He destroys his speculative notes rather than accept a fixed future 408.

A Time Flower then transports him to an unfamiliar place and era. During the ensuing ship incident, he frees captives and controlled Nidoking, defeats Apollo’s command of the vessel, and confronts a giant Dragonite by testing Litwick’s Power Split 409 413 414.

Later, Dian escapes Sabrina’s Dollhouse with help from Misdreavus and Meloetta, but most of his Poké Balls remain sealed by Darkrai’s Nightmare Power. Beedrill’s subsequent Nightmare Form creates a new problem: immense strength without a known way to reverse the transformation 436 438.

Gym leadership and League competition

By the Fuchsia Conference, Dian is publicly identified as Qinan City’s Gym Leader. He accepts an exhibition against Robert partly because the Kanto League and Lorelei helped secure his Beedrill Mega Stone. His victory strengthens the Gym’s prospects for funding and favorable assessments 445 448 459.

He later pursues entry to Hoenn’s Ever Grande Conference through the Pokémon Exam. His motivation has shifted from merely securing victory to seeking a battle he might genuinely lose and discovering what he and his Pokémon can accomplish together 478.

The tournament brings him against Kengo and eventually Tobias. The supplied account confirms his subsequent Hall-level breakthrough but does not establish the result of the Tobias match. At Mt. Pyre, he also seeks a friendly battle with Phoebe specifically to observe her Mega Evolution 486 523 565 572.

Kingdoms, ancient threats, and laboratory work

Dian’s Azoth activities pursue three objectives: demonstrating his strength, obtaining Jervis’s Mega Evolution research, and securing the support of a kingdom. He regards personal relationships, kingdoms, and Pokémon as more dependable foundations for his rise than expecting established institutions to commit fully to him 599.

After the Ancient Almia King incident, he persuades former Team Rocket leader Yōno Mihara to return home without a fight. His principal reward is Darkrai’s empty shell, which he treats cautiously because the king’s consciousness may still linger inside it. He then resumes laboratory work on Misdreavus, Beedrill, Tyranitar, and the shell 648.

Later travels and an ordinary-life interlude

Dian increasingly takes a mentoring role, advising Nozomi on raising Misdreavus and using Mawile’s public battle against Charizard to develop her experience rather than simply obtain a quick victory 664 671 672 673.

A later battle with Hunter J leaves both sides’ Pokémon exhausted without a decisive winner. Afterward, people close to Dian confiscate his Pokémon out of concern that his strength encourages suicidal risks. Yue proposes an industrial-espionage assignment under Kaoru Fujii’s identity, and Dian experiments with ordinary employment as a Pokémon observer 690 693 694 695 696.

After Ash wins the Sinnoh League, Dian accepts his challenge as an opportunity to provide further guidance. Misdreavus’s overwhelming performance demonstrates that winning a League tournament is not the endpoint of a Trainer’s development 709.

Appearance

• Hair and eyes: Black hair and black eyes 451.
• Formal clothing: Wears a jet-black suit and carries a briefcase when arriving for the Fuchsia Conference; the narration emphasizes a combination of severity and elegance 451.
• Glasses: Begins wearing glasses to protect his eyesight, explaining that good vision matters to a Trainer 174.
• Field equipment: Uses a specially made outfit comparable in function to a hunter’s combat suit 300.
• Unusual bodily change: Wakes in a female body with very pale skin and delicate features; the supplied passage does not explain the cause or duration 621.

Personality

Dian is analytical, guarded, and quick to turn observations into practical advantages. He prepares escape routes, reserves Pokémon for contingencies, and studies opponents’ identities and habits before committing to action. Bluffing Harley into surrendering a genuine map and exposing Bannai’s disguise illustrate his preference for information and leverage over straightforward confrontation 77 228 261.

His pragmatism includes deception, intimidation, and opportunism. He invents a detective-family background, manipulates Chinami’s literary ambitions, and uses flattery to attract Diancie. His covert removal of the Stardust Sea’s resources shows that his official responsibilities do not prevent him from pursuing personal profit 110 158 268 332.

That ruthlessness coexists with firm attachments. He refuses to use mind control to force Houndoom’s loyalty, treats Amaura Lulu as family, and describes Meloetta as a friend with her own will. Small acts—leaving food for unknown travelers, buying Lisa a meal, or setting aside research to comfort Ralts—show care without a tactical payoff 126 253 312 447 476 485.

Dian favors self-determination over fatalism. He argues that people can shape their futures, rejects the possibility of accepting a predetermined death, and increasingly encourages his Pokémon to develop independent judgment. Nevertheless, he remains unsure what “home” means or where his own journey should end 222 228 408 696.

Abilities and Skills

Internal Data Pokédex

Dian possesses an internal information-reading ability that reveals Pokémon data beyond ordinary visual assessment 12 173 695.

• Identifies moves, Abilities, developmental status, and whether an Ability remains capable of awakening 12 695.
• Helps him recognize unexpected traits, such as Beedrill’s Swords Dance and Jynx’s Dry Skin 12 159.
• Remains useful for move systems and ancient history even after Academy education reduces his reliance on it 173.
• Exceeds the documented scanning functions of Capture Stylers, which cannot reveal Abilities or assess a Trainer’s own Pokémon 173.
• Does not make every remembered assumption reliable; his experiments repeatedly correct his understanding of actual Pokémon mechanics 349.

Move Theory and Individualized Training

Dian organizes training around Ability, moves, and physical fitness, while also accounting for temperament, experience, and specialized conditioning 126.

• Linked move development: Traces pathways such as Psywave → Psybeam → Confuse Ray and uses established skills to support later techniques 126.
• Attribute conditioning: Develops Beedrill’s poison and physique together rather than treating attack power as separate from bodily growth 21 126.
• Temporary type changes: Uses Soak, Forest’s Curse, and Trick-or-Treat to help Pokémon practice Water-, Grass-, and Ghost-type moves 337.
• Independent learning: Gradually shifts responsibility toward the Pokémon, aiming for cooperation rather than permanent dependence on detailed orders 222.
• Type expertise: Identifies Ghost, Bug, Poison, and Grass as his strongest fields, with other types at varying levels of development 364.

Ability Research

Dian studies how Abilities arise, change, and interact with a Pokémon’s body and mind.

Research area	Findings or objective
Inheritance and transformation	A paper receives partial validation and establishes an academic income 174.
Simulated dual Abilities	Sandy Crystals support sustained Sandstorm use, approximating Sand Stream alongside an existing Ability; the method requires continued material supply 252 336.
Permanent Ability alteration	Proposes combining Dream Force, Ability Capsules, Xerneas’s power, and Evolution Power to move beyond natural Ability slots. This remains an experimental ambition in the cited account 336.
Controlled trials	Sorts 69 Sewaddle by Ability and uses Everstones to prevent evolution from confounding the experiment 337.
Copying and exchange limits	Tests Skill Swap, Role Play, and related mechanisms; finds limits involving duration, distance, bodily strain, and how fully an Ability can function 349.
Signature Abilities	Treats abilities such as Flower Gift and Battle Bond as involving an additional unknown factor that available methods cannot copy or exchange 349.

Spirit World and Evolution Research

Dian develops methods intended to expand Misdreavus’s power without forcing an unwanted conventional evolution 398 476 520.

• Spirit World Exile: A proposed system combining Psychic spatial techniques with Ghost powers, potentially enabling shadow-space concealment, gateways, and the displacement of enemies into the Spirit World 364.
• Early limitations: Misdreavus’s Spirit World travel initially consumes too much stamina and takes too long to use effectively in battle 445.
• Petrification experiments: Establishes that dark spiritual energy petrifies matter and energy, while stronger or more abundant energy offers greater resistance 519.
• Energy stabilization: Finds that petrification can stabilize otherwise unstable energy; develops gradual enhancement through a Substitute and an infused Everstone 520.
• Safety restraint: Shelves a proposed combat-power meter because its dangerous operating principle could instead become an assassination weapon 520.

Ranger Operations and Tactical Command

• Coordinates surveillance, status effects, ambushes, and restraint across multiple Pokémon 77 154.
• Uses institutional intelligence to investigate identities and opponents’ teams before confrontations 220 262.
• Exploits move properties rather than relying only on type advantage or raw strength, including Mawile’s layered defensive combinations against Charizard 451 672 673.
• Employs disguises, false affiliations, and tailored recruitment; his Kodai investigation includes a bounty posting designed to attract Jessie, James, and Meowth 145 300 460.
• Understands procedural limits: a proposed company search still requires authorization despite his investigative authority 460.

Mental Power and Personal Limits

• Trains Mental Power to improve Mega Evolution control 450.
• Resists Hypnosis, attributing this to his nightmare-realm experience, Ranger Mental Power, and Latias’s feather 450.
• Communicates privately with Ralts through Telepathy during battle; the passage does not establish independent Psychic mastery on his part 486.
• Fails Sabrina’s test for learning Psychic powers and accepts her conclusion that he lacks the required aptitude 450.
• Acknowledges that without Latias and Silver Sovereignty, he is more likely to hold off an Elite or retreat than win a direct confrontation 648.

Pokémon

The following are documented partners and training subjects, not a fixed six-Pokémon party.

Pokémon	Role and notable development
Misdreavus	First Pokémon and near-constant companion. Central to his move-system, spell, Spirit World, and unconventional evolution research 126 154 339 409 520 709.
Beedrill	Principal example of attribute conditioning; develops through poison training, Swords Dance, Nightmare Form, and Mega Evolution 12 21 126 438 520.
Hoppip → Skiploom → Jumpluff	Practices status techniques, Energy Ball, and Bullet Seed; later helps gather experimental materials 77 159 173 519.
Zubat	Scout and utility partner; Chinami occasionally borrows it. Its attachment to a female Golbat becomes a source of comic frustration for Dian 99 174 268.
Honedge → Doublade	Obtained through the Napolant affair; guides Misdreavus’s training. Dian initially suspects Honedge may be a weakened Aegislash 126 173 182 268.
Larvitar → Pupitar → Tyranitar	Receives broad multi-type conditioning, Sandy Crystal supplementation, and vibration-based training. Its growth creates major food and mineral expenses 159 176 268 401.
Slowpoke and Quagsire	Sent to Lorelei for Psychic- and Ice-type development; Dian continues checking on their condition 173 174.
Aggron	Entrusted to protect Yue, later participates in type training and research-material collection. Its fights with Probopass damage institute grounds 281 337 445 519.
Trapinch → Vibrava	Willingly accepts capture after following Dian; later motivates his interest in the Earth Clan’s Dragon-type teachings 268 364.
Snivy → Servine → Serperior	Initially suppresses evolution and Contrary because they threaten familiar tactics. Dian later helps it control its evolved power 339 394 476.
Mawile	Diligent but initially short on serious battle experience; develops through electrical interference, mobility, and layered defenses 671 672 673.
Ralts	Sensitive novice whom Dian reassures through Telepathy; demonstrates Shadow Ball defense and Imprison against Kengo’s Alakazam 447 486.
Eevee / Glaceon	Eevee practices aura-based Foresight; later passages feature Glaceon gathering Avalugg ice and battling alongside Dian 401 519 690.
Helioptile	Learns Surf during temporary-type training 337.
Litwick	Helps disable Team Rocket operatives and tests Power Split against the giant Dragonite 413 414.
Teddiursa → Ursaring	Entrusted to Yue for a period; later appears evolved during Dian’s visit to Professor Xiuli 281 619.
Meloetta	Traveling friend whom Dian explicitly recognizes as having her own will; helps him escape Sabrina’s Dollhouse 436 476.
Amaura Lulu	Dian regards her as his and Fennel’s child, making Hunter J’s abduction deeply personal 312.
Alolan Vulpix	A young Pokémon carried by Misdreavus and later greeted by Dian at the institute 394 445.
Phantump and Pumpkaboo	Obtained in Kalos and used for Forest’s Curse and Trick-or-Treat training 334 337.

Equipment and Items

• Capture Styler — Ranger tool used for Pokémon interaction, records, communications, and investigations; its data functions are more limited than Dian’s internal Pokédex 173 408 413 584.
• Physical Pokédex — Separate from his internal ability. A spare device loaded with video programs and selected species information becomes his gift to Diancie 331 332.
• Blue jewel necklace — Napolant relic that attaches itself to him, causes visions, and resonates with distant ruin machinery 99 181.
• Soul Dew — His possession of it informs his belief that Alto Mare’s machine cannot be activated without another one 187.
• Latias’s red feather — A token she asks him to keep; it changes temperature and contributes to his protection against Hypnosis 276 281 450.
• Sword of Royal Authority / Silver Sovereignty — A powerful asset associated with Napolant. Sacred Sword destroys Hunter J’s airship, but the expenditure requires recovery; Silver Sovereignty is later dormant 350 648.
• Beedrill Mega Stone — A strategic resource obtained with Kanto League approval and Lorelei’s intervention 445.
• Steel Coating — Initially receives a bottle from Masamune; later applies Steel Coating to his Pokémon 124 273.
• Pink diamond shard — Retained after his visit to the Diamond Domain 334.
• Kodai’s black memory card — Contains data he cannot decode without access to the company’s systems 460.
• Darkrai’s shell — Held in a pitch-black Poké Ball after the Ancient Almia King incident; potentially still contaminated by the king’s consciousness 648.

Relationships

Companions and collaborators

• Yue Jifei / Kisaki — Traveling companion, confidante, and business planner. She helps develop his commercial proposal, challenges his ideas about fate, and later encourages an ordinary-life interlude because she fears losing him 220 228 276 694 696.
• Lorelei — Longstanding acquaintance, mentor, and influential supporter. Recommends him to the Academy, trains some of his Pokémon, helps obtain Beedrill’s Mega Stone, and enforces his recovery when he is injured 159 171 173 445 634.
• Officer Jenny Chinami — Investigative partner and friend. Their cooperation includes Aaron’s capture, intelligence sharing, favors, and recurring disputes over spending Dian’s money 110 158 394 442.
• Fennel / Professor Makomo — Research collaborator with whom he shares a family-like attachment to Amaura Lulu. Her team provides the resources for his Ability experiments 286 312 337.
• Nurse Joy Lisa — Friend and medical caregiver. Dian preserves the lunchbox she gave him and later uses it to bring her a meal during an exhausting shift 450 485.
• Azisa — Trusted training adviser and research contact. Dian seeks her guidance, exchanges gifts with her, and includes her in discussions of evolution research 124 174 312 476.
• Latias — Close companion, protector, and potential battle ally. Rescues Dian, restores his memories, explains legendary auras attached to him, and offers to become his strength before the Tobias match 281 334 523.
• Diancie — Initially a prospective trading partner attracted by his Pokédex gift. Later seeks his help after leaving home; Dian suspects, but does not confirm, that she caused his sudden physical recovery 332 441 450.
• Princess Sarah — Escort assignment that becomes a friendship. Dian assists her through Mirazu’s crisis and insists that helping her is natural because she is his friend 268 281.
• Courtney / Karen / Yitiao Kelian — Research contact and Team Magma officer whose identity Dian exposes. Their exchanges combine manipulation, mutual knowledge, and cooperation; he eventually fulfills a promise to help restore the Land of the Earth 261 262 268 648.
• Sabrina — Dangerous acquaintance and occasional collaborator. Their interactions range from his escape from her Dollhouse to her testing his Psychic aptitude and researching his Pokémon 436 450.
• Rumi — Ranger Union operational contact who supplies mission intelligence, coordinates assignments, and cautions him against bypassing procedure 237 268 460.
• Anabel — International Police contact whose cooperation with Dian is tempered by mutual suspicion and withheld information 312 313 319 460.
• Kusunoki — Mentor on advanced Swords Dance and the responsibilities of battle; encourages a path suited to Beedrill rather than imitation of Gallade 337 338.

Rivals, students, and opponents

• Tomoya — Early rival who promises a future rematch at Mt. Silver after losing to Beedrill 12.
• Ash — Younger Trainer who repeatedly seeks to challenge Dian. Dian later uses their post-Sinnoh League battle to demonstrate the distance beyond tournament success and suggest further training directions for Pikachu 451 709.
• Dawn — Rescued by Dian near Twinleaf Town; later receives Swablu in her care and supports him at his matches 371 394 485.
• Robert — Cordial exhibition opponent whose emotional control as a Coordinator contrasts with Dian’s command of move mechanics 451 459.
• Phoebe — Ghost-type Elite who agrees to a friendly battle rather than a formal challenge involving her family’s inherited Pokémon 565 569.
• Hunter J — Recurring enemy responsible for abducting people and Pokémon close to Dian. Their later direct battle leaves both sides exhausted without a decisive Pokémon victory 312 690.
• Nozomi — Sinnoh Coordinator who seeks Dian’s advice on raising Misdreavus 664.

Notable Quotes

“I didn't. It's just a habit. Part of the job. I hope you understand.”
— Explaining how he bluffed Harley into surrendering the real map 228.

“Princess Sarah is my friend. Helping her is only right.” 281

“If his body became strong enough to restrain his mind instead, and then put it to use, would that work too?”
— Proposing Beedrill’s alternative route to a second Swords Dance 338.