Aron

Biodata

Power Progression

Appearance

Aron originally had a dark-gray, armored body, blue eyes, and a mask-like head. Its body was marked by several black holes, and it was approximately the size of a Border Collie. Aron measured 47 cm tall and weighed 50 kg when examined at a Pokémon Center. 4 12

After evolving into Lairon and then Aggron, its body became progressively larger and more heavily armored. Aggron stands upright, has two horns, an extended armored snout, a helmet-like layer of plating over its head, and thick silver armor resembling a heavy tank. 40 94

Distinguishing features include:

• Steel armor covering its body, with several dents and uneven areas caused by malnutrition and poor care. 12
• A small, sturdy build despite its considerable durability.
• A mask-like head and bright azure eyes. 4
• A tendency to reflect sunlight from its metal body, requiring Baimu to make desert-colored camouflage covers for it. 30
• Strong territorial instincts after evolving into Lairon; it claimed Baimu’s backyard as its territory. 50
• A much larger, heavily plated form after evolving into Aggron. 94
• A powerful presence that can cause even experienced Trainers to feel as though they are facing an exceptionally dangerous Pokémon. 980

Personality

Aron is cautious, observant, and unusually intelligent. During the mine assessment, it avoided attacking Baimu, concealed itself in a hole, and later followed him after deciding that he was safe. It understood Baimu’s explanations and accepted a request to rescue injured participants in exchange for iron. 5 6

Its early caution stems from abandonment and mistreatment by a former Trainer. Aron feared Poké Balls and initially fled when Baimu tried to ask whether it had a Trainer. Despite this fear, it continued following Baimu and later risked itself to protect him. 7 8

Aron is fiercely loyal and protective. It repeatedly placed itself between Baimu or Chansey and stronger opponents, including Donphan, Machamp, Mightyena, and Bewear. It also showed a strong desire to remain useful, causing Baimu to worry that its relentless training was motivated partly by fear of being abandoned again. 13 14 26 37 40

Aron also has interests that do not match its species’ usual associations. During the desert competition, it became fascinated by a clump of weeds, and after evolving it developed an intense enthusiasm for plants and gardening. 31 49

As Aggron, these traits developed into fierce devotion, protectiveness, and a strong emotional dependence on Baimu. It is normally mild-tempered around its Trainer but becomes possessive when it believes another Pokémon might interfere with their relationship. 1355 1479

The younger Aron encountered during Baimu’s journey through the past was fearful and distrustful because of its mistreatment by Pokémon merchants. Nevertheless, it was brave enough to rescue two trapped Sandshrew and patient enough to wait in the abandoned mine for the Trainer destined to become its partner. 1478 1480

Abilities & Skills

Steel Armor and Durability

Aron’s metal armor allows it to withstand attacks that would seriously injure less durable Pokémon.

• Mightyena’s Crunch failed to pierce its armor. 37
• It endured repeated attacks from drug-enhanced Mightyena and Bewear while protecting Baimu and Chansey. 39
• Its defensive strength made it effective as the team’s frontline fighter and shield. 25 37 40
• As Aggron, it could withstand attacks from Calyrex without needing the Reins of Unity severed. 1355
• Mega Aggron endured Gigantamax Duraludon’s G-Max Depletion, Metal Burst, and other attacks with almost no meaningful damage. 870
• It remains vulnerable to powerful Ground- and Fighting-type attacks, making direct confrontations with such opponents dangerous, although Magnet Rise and its later defensive growth reduce this weakness. 8 16 40 1355

Rock Head

Aron’s recorded Ability is Rock Head. 12

• The context does not document a specific activation or application of the Ability.

Dig and Underground Movement

Aron can use Dig to evade attacks, hide underground, and launch surprise attacks.

• Avoided Graveler’s Rollout by digging underground. 16 17
• Used underground movement against Rhyhorn during the mine escape. 8
• Followed Baimu’s plan to approach an enemy through the ground during the desert competition. 31 37
• Its underground positioning occasionally created risk; it surfaced too close to an enemy during one ambush. 31
• As Aggron, it used Dig to hide beneath a Sand Tomb and coordinate a surprise attack against Mightyena. 326

Iron Head

Iron Head is one of Aron’s primary close-range attacks.

• Defeated Graveler after exploiting its inability to stop Rollout. 17
• Attacked Rhyhorn while attempting to protect Baimu. 8
• Struck Galarian Linoone in the waist after Baimu used a flashbang to create an opening. 37
• Continued using the move while exhausted, helping create the opening for its evolution into Lairon. 40
• As Aggron, used Iron Head to trap and pressure Mightyena at close range. 326

Rock Tomb

Aron learned Rock Tomb before the competition.

• Creates a field of flying stones that can obstruct opponents and restrict movement. 26
• Used defensively to shield Chansey from Mightyena and Galarian Linoone. 37
• Built a temporary barrier against drug-enhanced Mightyena and Bewear, though the two Pokémon forced their way through it. 39
• As Aggron, used Rock Tomb to restrict Courtney’s Mightyena during a later battle. 326

Aggron’s Advanced Moves and Techniques

After becoming Aggron, Aron expanded its combat style beyond close-range defense.

• Double-Edge — Used immediately after evolving during the Pyrite Arena semifinals. 94
• Flash Cannon — Fired as a final attack before being defeated by Claydol. 94
• Sand Tomb — Used to create a large sandstorm that could conceal Aggron’s movements and support underground ambushes. 40 326
• Stealth Rock — Learned after sparring with Steven’s Aggron. 477
• Body Press — Uses Aggron’s immense Defense as offensive force; Mega Aggron used it to defeat Gigantamax Duraludon. 870
• Magnet Rise — Learned after Aggron’s later power increase, allowing it to temporarily avoid Ground-type attacks. 1355
• High Horsepower — Used to defeat Paul’s Electivire in a single attack after ignoring its strongest moves. 1382
• Rocket-like charging technique — A high-speed attack developed during training with Steven’s Aggron and combined with Heavy Slam. 477

Rescue and Support Work

Aron can perform practical tasks beyond battle and follows complex instructions when it trusts Baimu.

• Rescued unconscious and injured participants from the Jade Mine. 6
• Secretly followed Baimu and Cheng Hong during their escape. 7
• Retrieved Baimu’s bag during the desert competition. 32
• Pulled injured people to safety and assisted Baimu in evacuating them. 6 32
• Helped destroy a hidden transmitter by chewing it into pieces. 30
• As Aggron, rescued a younger Aron and two trapped Sandshrew during the blackout and chaos in Pyrite Town. 1478
• Its future self eventually helped create the circumstances that allowed the younger Aron to survive in the abandoned mine and meet Baimu. 1479 1480

Iron Consumption

Aron feeds on iron ore and can chew through iron ingots.

• Its species is known to consume iron ore and damage bridges and railway tracks. 4
• Accepted iron ingots as payment for helping Baimu in the mine. 6
• Swallowed the ingots easily, treating them like biscuits. 7
• Baimu used iron as an early means of building trust with Aron. 6 7
• Baimu later supplied the younger Aron with a large stockpile of iron in the abandoned mine so it could survive while waiting for its destined Trainer. 1479 1480

Equipment / Items

• Iron ingots — Used by Baimu as food and payment while negotiating with Aron in the mine. 6 7
• Poké Ball — Initially frightened Aron, but it later accepted being recalled when necessary during battles. 7 14
• Desert camouflage covers — Cloth covers made by Baimu to reduce sunlight reflecting from Aron’s metal armor. 30
• Protective arm guard — Baimu’s arm guard absorbed most of Mightyena’s bite when Aron’s battle placed him in danger. 40
• Iron supply in the abandoned mine — Baimu left numerous iron ingots for the younger Aron after explaining that it needed to wait for its destined partner. 1480

Relationships

• Baimu — Trainer and chosen partner. Their relationship begins with caution and negotiation, then develops through mutual rescue, constant companionship, and shared battles. Baimu refuses to force Aron into a Poké Ball or treat it as disposable. Their meeting is later revealed to be part of a time loop in which Aggron’s future self helped ensure that the original Aron encountered Baimu. 6 10 12 14 1479 1480
• Aggron — Aron’s future evolved self. Aggron recognizes the younger Aron during Baimu’s journey through the past, rescues it, and takes responsibility for guiding it to the abandoned mine. It is protective and possessive toward its younger self because it fears that changes to the past could disrupt its bond with Baimu. 1478 1480
• Chansey — Teammate and support partner. Aron initially helps Baimu make Chansey feel safe, later protects Chansey repeatedly in battle, and cooperates with her healing and sound-based moves. 23 24 37 40
• Vibrava — Temporary teammate. Aron initially remains cautious around Vibrava, but the two eventually cooperate as Baimu’s battle team. 24 26
• Former Trainer / former owner — Aron’s past is connected to abandonment, trafficking, and mistreatment. A Rustboro City man had caught and owned the Aron later found in Pyrite Town, but the Pokémon was used as gambling collateral and resold to a Pokémon hunter. 7 8 1477
• Sandshrew — Two Pokémon rescued by Aron during the Pyrite Town blackout. Aron attempted to save them from beneath a collapsed steel plate before Aggron arrived to help. 1478
• Rhyhorn — Major early opponent. Aron attacked Rhyhorn to protect Baimu and was badly injured before Baimu returned to rescue it. 8 9
• Jian — Enemy Trainer whose drug-enhanced Pokémon forced Aron into one of its most difficult battles. Aron’s evolution into Lairon helped defeat Jian’s Mightyena and Bewear. 37 40

Story Role / Major Arcs

Mine Encounter and Partnership

Aron first appears in the abandoned mine used for the Quicksand Team’s recruitment assessment. It approaches Baimu without attacking, hides from the Vibrava patrolling the tunnels, and later follows him. Baimu earns its cooperation by offering iron and asking it to rescue injured participants. 4 6

When Aron becomes frightened by a Poké Ball, Baimu realizes that it may have been abandoned or mistreated. Aron nevertheless follows Baimu during the escape and later attacks Rhyhorn to protect him. After Aron is buried and badly injured, Baimu turns back into the collapsing mine and promises, “I came to get you.” 7 9

At the hospital, Aron accepts Baimu as its partner by placing its paw in his hand. 10

Recovery and Early Training

Aron is found to be malnourished, underweight, and covered in damaged metal plating, despite having previously received careful training. Baimu chooses money instead of another Pokémon reward so he can feed and rehabilitate it. 11 12

Baimu keeps Aron outside its Poké Ball to build mutual understanding through constant companionship. Aron learns Endeavor, receives level-up rewards, and begins battling regularly despite its injured leg. 12 16 18

Battle-Team Development

Aron becomes Baimu’s primary fighter and defender. It defeats or battles Otsuka’s Pokémon through the use of Dig, Iron Head, and battlefield positioning. These battles also reveal that combat accelerates the simulator’s loading process. 16 17

After Chansey joins the team, Aron helps her adjust by remaining calm and obeying Baimu’s instructions. Chansey’s Heal Pulse greatly improves Aron’s endurance, allowing it to train and battle more frequently. 23 26

Desert Competition

During the competition against the Hound Team, Aron helps Baimu destroy a hidden transmitter and uses camouflage to avoid detection. It assists in ambushes, retrieves supplies, rescues allies, and protects Chansey from stronger opponents. 30 32 37

Aron’s durability becomes critical during the battle against Jian. It blocks attacks, shields Chansey, and continues fighting after being overwhelmed by drug-enhanced Mightyena and Bewear. Its determination culminates in its evolution into Lairon, after which it defeats both opponents with Sand Tomb. 37 40

Life as Lairon and Aggron

After evolving, Lairon reveals an enthusiasm for plants and gardening. Baimu buys it a sapling and a Berry-producing bonsai, later giving it a backyard that Lairon immediately claims as its territory. 49 50

Lairon later evolves into Aggron during the Pyrite Arena semifinals. The evolution occurs while it is nearly defeated, but Aggron continues fighting and lands decisive attacks against Claydol despite ultimately losing the match. 94

As Aggron, it becomes Baimu’s principal powerhouse and develops advanced defensive and strategic abilities. It learns Stealth Rock, develops a rocket-like charging technique, later learns Magnet Rise, and eventually reaches level 98 after receiving extensive simulator rewards. 477 1354 1355

Return to Pyrite Town and the Time Loop

Baimu later returns to Pyrite Town as a special investigator and uncovers records of a Rustboro City man whose Aron had been used as gambling collateral and resold to a Pokémon hunter. Baimu arranges the man’s escape from Orre and orders the River Association to recover the missing Aron. 1477

During a retaliatory operation against Pyrite Town’s criminal organizations, Baimu finds several escaped Aron. Aggron recognizes one of them as its younger self. The younger Aron is attempting to rescue two trapped Sandshrew, and Aggron protects both it and the Sandshrew from a Pokémon hunter. 1478

Aggron then reveals that this encounter is connected to the origin of its relationship with Baimu. In the original timeline, a mysterious Pokémon helped Aggron survive the mine collapse and indirectly ensured that it met Baimu. Aggron now realizes that the mysterious helper was its future self. 1479

To preserve the time loop, Aggron takes the younger Aron to the abandoned mine where it originally met Baimu. Baimu reassures Aron that it has not been abandoned and leaves it with iron supplies while instructing it to wait for the destined partner who will eventually arrive. 1479 1480

The younger Aron begins hiding the iron and accepts that it may need to remain in the mine for a long time. Baimu leaves without meeting his younger self, choosing to preserve the chain of events that led to his partnership with Aggron. 1480

Trivia

• Aron was the first Pokémon to become Baimu’s partner.
• Baimu initially suspected that Aron might be the obtainable Pokémon hinted at by the simulator’s clue. 5
• Aron’s first reliable contribution to Baimu’s survival was rescuing injured assessment participants from the Jade Mine. 6
• It was afraid of Poké Balls before gradually accepting Baimu’s partnership. 7 11
• Baimu’s recorded status for Aron lists it as male, 47 cm tall, 50 kg, and possessing Rock Head. 12
• Aron’s evolution into Lairon was described as the “Miracle of Life,” occurring during a battle in which it continued fighting despite extreme exhaustion. 40
• Lairon later evolved into Aggron during the Pyrite Arena semifinals. 94
• Aggron eventually became Baimu’s principal powerhouse and reached level 98. 1354 1355
• The younger Aron encountered in Pyrite Town was the same individual whose future evolved form became Aggron, creating a closed time loop around Baimu’s original partnership. 1478 1480
• After evolving, Aggron retained its enthusiasm for plants and gardening while developing an intense attachment to Baimu. 49 50 1479