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Hero Overview

I realized that back then, the reason I wanted to become human, was that I really just wanted to have friends. Now, I just want to be a monster that can help Luffy.
~ Tony Tony Chopper

Tony Tony Chopper is the doctor of the Straw Hat Pirates. Chopper is a reindeer that ate a Devil Fruit called the Human-Human Fruit(ヒトヒトの実, Hito Hito no Mi). He came from Drum Island, which makes him the only member of the Straw Hat Pirate Crew who was born on the Grand Line. He is the sixth member of the crew and the fifth to join Luffy, as well as being the youngest member on board. He has a bounty of 50 berries and later 100 berries due to being mistaken for the crew's pet. Personality he is the main supporting character that supports the Straw Hats Pirates.

He is voiced by Ikue Ōtani in the Japanese version of the anime, who is the best of voicing Pikachu in the Pokémon series, and by Brina Palencia in the English version of the anime.


Chopper often acts very childish because he is innocent and does not know any better. Besides being naïve, he is also extremely shy towards strange humans, especially before meeting the crew.

Similar to Usopp and Nami, he is sometimes a coward, but his cowardice can be attributed to his childishness and low confidence in his own fighting abilities, which contrasts with both Nami's cowardice based on her self-survival and with Usopp's cowardice based on his insecurities. Also, similar to Luffy, he is always easily impressed at things like beams, cannons and hidden abilities. Because Chopper is more or less on a journey to define himself, he often sees the members of the crew as role models, which causes him to imitate their behavior sometimes, especially Usopp.

He is an upright friend and companion who will try anything to overcome a task given by his team. He still has a feeling of distrust for humans from his youth, and will often outright insults and claims that compliments do not make him happy even though he is obviously happy about it (he starts to do the "Dirty Old Man" dance which was a bit by famous Japanese comedian Ken Shimura, which became a running gag).

Chopper seems to be very forgiving of those close to him, for when Usopp wanted to rejoin the crew at the end of the Enies Lobby Arc, he called out to Luffy and Zoro, although they were ignoring him completely.

His dream is to carry out his deceased adoptive father, Hiluluk's belief that there is no incurable disease, and to become a doctor that can cure any illness. To this end, his childish nature vanishes whenever his medical skills are required; he does not hesitate in the least in any actions regarding the well-being of his patients.

Chopper also has the strong belief that a doctor is supposed to help save people, and becomes angered when somebody treats life without the proper respect. This was why he was greatly furious at his former hero, Dr. Hogback, when the man treated the patients' and Zombies' lives, and deaths, so callously. He was also enraged at Caesar Clown, for kidnapping and experimenting on children, and making them addicted to drugs.

Another one of Chopper's habits is his reverse cartoon peek, where he stands behind a wall or a doorway and peeks at people, trying not to be seen by them. Unfortunately he is not hiding his body behind the wall, as a result his body is visible and only one half of his face is hidden.

He also tends to panic quickly, and subsequently let some crucial facts slip his mind. One example is when there is someone who is injured, he often panics and screams "Call a doctor!!". It is not until he figures out that is the doctor that he starts to tend to the injured person. Another one is when he (and Brook) jumps into the water without hesitating to save Luffy from drowning, only to drown with him (since the Devil Fruit which he had eaten makes it impossible for him to swim). He, together with Brook and Luffy, ends up being saved by the other members of the crew.

After the timeskip, Chopper seems to have grown more confident, much like Usopp. He no longer strives to be looked at as a human, now only wanting to "be a monster that can help Luffy" as he put it. He even has grown mature enough to smack his crewmates, mostly Zoro and Luffy, when they try to do something stupid or extreme. He also seems to have outgrown the habits mentioned above.

Abilities and Powers

Though it is rare for doctors to fulfill roles other than medical practices for the benefit of those around them, but as the Straw Hats' doctor, Chopper's responsibilities are not limited to just medicine alone.

Medical Expertise: Being the doctor of the crew, Chopper possesses a vast knowledge of both medicine and medical drugs as well as the preparations of most remedies and ointments ranging from regular fruits, roots, and vegetables that can be found and used on most islands. He is also capable of administering surgery and resuscitation.

Most of the healing methods that he uses are from the things he learned during his apprenticeship under both Dr. Hiluluk and Kureha, with the latter teaching him most of the medicinal procedures that he has so far mastered. After the timeskip it is assumed that his medical skills have only improved.

In addition while he was under the apprenticeship of Dr. Kureha, Chopper became aware of the highly addictive drug NHC10 (which only selected scientists in selected countries are allowed to use), and its harmful side effects. And is capable of stabilizing the condition of someone suffering from an overdose of the drug.

Perhaps as a another testament to his intelligence, he was also able to invent his very own drug known as the "Rumble Ball", through a little research; which helps to increase his Devil Fruit's fighting capabilities. (for more information look below)

He has also been shown being able to give successful blood transfusions (even between to different species: a human and a fishman, though human and fishmen do carry the same blood), as he did to save the lives of both Sanji and Luffy, after too much blood loss (even knowing their correct blood type: Luffy's blood type being F (the same as Jinbe's), and Sanji's blood type being S RH- (an unusually rare blood type).

Devil Fruit

Chopper has eaten a Zoan-class Devil Fruit known as the Hito Hito no Mi, and with the powers of the Hito Hito no Mi, it allows him the ability to transform into a human and human-reindeer hybrid at will. By consuming the fruit, Chopper has been given human intelligence, allowing him to understand and communicate in human language. The fruit has also given Chopper the ability to perceive concepts such as medicine that a reindeer would not comprehend. It also allows him to transform into human/reindeer hybrid forms.

The fruit is further strengthened by the use of the Rumble Ball. This drug allows Chopper to access other forms of varying human and reindeer proportions. The Rumble Ball however is not a thing that should be applied as the consequences to the powers of the fruit and the user himself can be quite disastrous.

The major weakness of the fruit, in the case of Chopper, is that the forms it gives him do not outright resemble humans and are often mistaken for something else. Examples include his human form being mistaken for a gorilla and his human hybrid form being mistaken for a tanuki. This is what originally alienated Chopper from both deer and humans alike. However, despite this, one advantage of this is that Chopper can easily hide from enemies while in a form they have not seen before. Other than that, the user is susceptible to standard Devil Fruit weaknesses.


The powers of the fruit have been used by Chopper for a variety of ways. Chopper mostly uses them in order to interact and understand humans. He has used them to a point that he is able to talk human whilst in his normal animal form. In the midst of battle, Chopper has also used his Devil Fruit powers in order to fight enemies with the strength given by the Devil Fruit. With the Rumble Ball he developed, Chopper can further use his Devil Fruit powers to an extent unlike most other Zoan Devil Fruit users.

According to Chopper, during the two years of his absence, he has completely improved all his transformations. Furthermore, he only needs the Rumble Ball to access one transformation point, his previously uncontrollable Monster Point. He can now freely transform into any of his other six forms (seven before the timeskip). Chopper still used the Rumble Ball to transform into Guard Point when they first encountered the Kraken in the manga, though this was corrected in the anime when he transformed into Guard Point without using a Rumble Ball. In an SBS, Oda jokingly stated that Chopper had actually eaten a Rumble Ball Candy in the manga, confirming that it was an error.Since the timeskip, Chopper can freely transform between all of his forms except Monster Point, which requires a Rumble Ball.

Normal Transformations

Like all Zoan Devil Fruit users, Chopper possesses the ability to turn into three forms. These forms are called Walk Point, his normal form, Brain Point, his human hybrid form, and Heavy Point, his human form.

Walk Point

Walk Point, literally "Walking Power Strengthening") is Chopper's form as a normal reindeer, useful for general travel on foot. It is called "Sprint Boost" in the 4Kids dub and "Limb Boost" in the Viz Manga, but it keeps its original name in the FUNimation dub.

Being his original form, this is apparently the only form that actually ages as Chopper grows older. It is unknown whether or not his overall aging process is halted or even nullified whenever he assumed his other Zoan forms. Despite reindeer physiology possessing no vocal cords capable of human speech, Chopper is able to speak the human tongue in this form, similar to a few other animals in the One Piece World like Pappug. During battle, Chopper usually uses this to run across the battlefield to dodge an enemy's attack or otherwise. During any other time, Chopper is completely disguised in this form as he usually looks like a pet. This form also allows him to track his friends or enemies more easily thanks to the reindeer's strong sense of smell. Chopper looks like a typical reindeer in this form, the only thing differentiating him from other reindeer, other than his clothes, being his abnormally colored blue nose which is mostly noticed by other reindeer. Also his antlers look different than another reindeers' with non-pointed ends.

At nine years old, this form was relatively small and resembled a regular reindeer faun. It had a short snout and no fur at the shoulders. At fifteen years old, this form was more mature with a longer snout and prominent fur at the shoulders. At seventeen years old, this form drastically matured and became more stag-like. Chopper's size has grown to a full sized reindeer (at a size smaller than a horse). His antlers have grown and branched out. His fur in this form is also notably fluffier.

Heavy Point, literally "Weight Strengthening") is Chopper's "human" form, which gives him a human-like appearance and height. In this form, nearly all of Chopper's reindeer physical characteristics are gone. Only Chopper's blue nose and parts of his fur remain. This form also imbues Chopper with peak human(primate) strength and agility which comes in handy in battle or otherwise, on rare occasions this form has also been used to dodge in the air by turning into this form to fall at a faster rate. Chopper usually uses this form to try to blend in with other humans, but it is often mistaken for the Abominable Snowman or some other similar hairy hominid.

Brain Point, literally "Intellect Strengthening") is Chopper's reindeer and human hybrid look, with a small body and large head. Chopper is smarter in this form, and is seen in it most of the time. When fighting against enemies, Chopper usually changes into this form immediately in order to dodge an attack due to its small size. In addition, he can scope out an enemy's weakness in this form, while he is under the influence of a Rumble Ball. In the Viz Manga, 4Kids dub, and edited FUNimation dub, it is named "Brain Boost", but it keeps its original name in the uncut FUNimation dub. This is also the form where he does his best thinking of strategies, as he can utilize both human intelligence and reindeer sensitivity at the same time. Chopper is often mistaken for a tanuki in this form.This is also the only form that is posted on Chopper's wanted poster. However, due its physique, Chopper was easily mistaken for a pet by the authorities, hence his very low bounty.

After the two year timeskip Chopper's Heavy Point has grown larger, muscular and makes him appear even more monstrous than before. In this form he was able to block a powerful strike from a drug enhanced Dosun's hammer by punching it head on and receiving just a little damage to his hand. Chopper has also shown enough strength to hold back a door against a group of rampaging giant children (with help from Mocha)Jumping Point, literally "Flight Power Strengthening") is where Chopper keeps his reindeer legs in a human-like form, which allows him to jump long distances. Its jumping capabilities are so high that even Sanji (who possesses great jumping power himself) was thoroughly impressed upon seeing Chopper utilize this form. This form is perfect for avoiding enemy attacks by allowing Chopper to dodge them by jumping high up in the air. The distance from which Chopper can jump into the air in this form can be quite remarkable that it can give him a massive advantage in height against opponents. However, despite its jumping capabilities, the form is relatively useless against enemies that can also move in mid-air. In addition, so far Chopper does not have any attacks that he can perform in this form. This form has mostly been used solely for evasive purposes only; in order to attack Chopper has to change to another form. This technique is called "Jumping Boost" in the Viz Manga, 4Kids dub, and edited FUNimation dub, but it keeps its original name in the uncut FUNimation dub.

Arm Point, literally "Muscle Strengthening") is one of Chopper's most powerful human forms; his biceps, triceps, and shoulders become extremely muscular in a human-esque form and he retains his hooves. In this form, Chopper's forearms become powerful enough to inflict a great amount of damage. They are capable of destroying a huge rock with one punch. They also have a certain amount of durability as seen when they were slashed by Chessmarimo with a technique that was capable of destroying a wall. Chopper usually turns into this form in battles in serious situtions. Guard Point, literally "Fur Strengthening") is where Chopper's fur grows out and covers his entire body leaving only his head and two legs visible. Chopper resembles an overgrown Chia Pet in this form. With this fur, Chopper is able to withstand against most outside attacks with this impenetrable shield. This form's fur also can only withstand certain types of attacks. This means any attack that is too powerful for the fur to withstand can damage Chopper even while he is in this form. After the two year timeskip the Guard Point has greatly increased in size, such that it was big enough to protect the Thousand Sunny from a blow from the Kraken's tentacle. As with his other forms, Chopper is now able to transform in this form without using a Rumble Ball. Although Chopper used a Rumble Ball to transform against the kraken in the manga, this was later confirmed to be an error. When Chopper used Guard Point against the Kraken, it was noticeably larger than when Franky used it after being switched into his body. It is currently unknown whether this was due to Chopper having greater control over his body than Franky, or whether Chopper is now able to freely control the size of the transformation.

Kung Fu Point, literally "Flexibility Power Strengthening") is a new form that Chopper added into his transformation during the timeskip. The form is average in size, being a head taller than the average person, with a squat body structure. His face and head become wider, and he has no visible neck. The upper lip on Chopper's mouth also become angular and points upward, and his facial expression appears to be transfixed. His arms and legs are short and very muscular, though not as much as Arm Point. He bears some resemblance to the human inhabitants of Torino Kingdom, the island where he spent two years training. He retains his hooves and his antlers remain the same shape, but appear to be slightly smaller. In this form, Chopper is very proficient in kung fu, allowing versatile movement, and making him strong enough to easily take down several Ammo Knights that were sent to arrest him and Sanji. It seems that it combines the power of Arm Point and the acrobatic skill of Jumping Point though to a lesser degree than each individual point. In this form Chopper has been shown to possess enough strength to easily break down giant steel doors. So far no named attacks have been given. Horn Point, literally "Horn Strengthening")is a form similar to Walk point, but with larger and sharper antlers. In this form, Chopper's human arms are retained and also become bulkier (and covered in fur) in order to compensate with the large load upon his head. With these huge antlers, Chopper can use them for a variety of ways, such as using them as a large shovel. Chopper first uses Horn Point against Mr. 4 and Miss Merry Christmas, labeling it his "most powerful form". After two years, the appearance of Chopper's Horn Point has evolved and changed drastically. He can now stand on two legs in this form and the shape and size of his horns have changed and grown greatly, though less sharp becoming much thicker resembling that of a stag beetle. His forearms are large (similar to Franky's pre-timeskip) and he now has hooves instead of hands. Furthermore his legs and feet have a humanoid structure though they are still hooved. Choppers face is similar to that of his Brain Point and he also has a hairier back. He has become taller as well and is now skilled with digging to the extent that he is comparable to Daruma of the New Fishman Pirates. It is unknown if he can still transform into his old Horn Point form. Before the timeskip, the consumption of three Rumble Balls in under six hours gave Chopper an additional Rumble Ball transformation, appearing to be a combination of all Chopper's Points except Brain Point (Heavy Point stance, Arm Point strength, Walk Point speed, Horn Point horns, Jump Point legs, and Guard Point hair). It naturally comes with an incredible increase in strength as well as height, even dwarfing the already inhumanly tall Kumadori and Bartholomew Kuma. As well, in this form Chopper's body seems to become incredibly dense and durable, as Kumadori could not harm Chopper with his Shigan and Rankyaku attacks. The true limits of Chopper's strength in this form are as-of-yet unknown, but Doctor Kureha once told Chopper that after he had used it for the first time, he managed to level an entire village on Drum Island. While in this form, he is capable of defeating very powerful opponents with ease. The prime example is CP9 member Kumadori, who was effortlessly defeated and thrown several miles away; Chopper's roar alone was fearsome enough to disable some of Kumadori's techniques. Another example was Sentomaru, who was forced into using his axe and still had difficulty fighting Chopper. When Franky (in Chopper's body) began to rampage in this form, Luffy was forced to use his "Gomu Gomu no Elephant Gun" technique to stop him (which had previously only been used to defeat opponents such as the Kraken and an Energy Steroid-enhanced Hody Jones. There were, however, two serious downsides to this form. The first was that before the timeskip, Chopper lost consciousness upon entering this form, meaning that it was no more than a berserker. Kureha even commented on this form being that of a true monster; a danger to friend, foe, and even Chopper himself. That statement reflected the form's second weakness: as Zoro observed, this transformation was potentially lethal to Chopper, as the amount of energy needed to maintain the form was too much for his body to handle. There were only two ways to end this form: an unspecified amount of time passing for when the Rumble Ball wears off (a period of less than three days, given that he was sent flying by Kuma while in Monster Point and landed in his Brain Point form), or when Chopper's Devil Fruit powers are negated by standard Devil Fruit weaknesses such as sea water, as demonstrated by Franky, when he blasted him into the sea. Either way, Chopper is rendered temporarily unable to move once he returns to normal due to stress placed on his body. At first, this form was not given a proper name. After the timeskip, Chopper has gained the ability to keep control of himself and communicate coherently while in this form which he named Monster Point (怪物強化(モンスターポイント) Monsutā Pointo though his voice is significantly deeper. It is now the only form he needs a Rumble Ball for and, by eating one, he can stay in it for three minutes. However, it still requires a colossal amount of energy to use; after reverting to normal, Chopper is too exhausted to move for approximately 2–3 hours.

Other Combative Capabilities

In addition to the transformational advantages that Chopper's many forms afford him in battle, he has also been known to employ wrestling-type moves (i.e.pinning down an opponent, or smashing them to the ground by means of supplex) from time to time. His extensive knowledge of the bipedal anatomy has also proved useful when the Straw Hats were trying to bring down Oars, during which time, Chopper formulated several theories on where it was best to target the colossal adversary, and finding the giant's weak spot. And while naive, he can also be quite a capable strategist, as seen in his fights against the Mr. 4 and Miss Merry Christmas pair and Gedatsu.

Chopper, who was originally an animal, is also capable of communicating with and understanding other animals, which has come in handy during certain points in the story. He also has a sensitive nose that can be used for tracking others (except during rainy weather). But because his nose is so sensitive, strong aromas such as perfumes can irritate his sense of smell.

Chopper also seems to have a technique called Tranquilizer (sometimes translated as Sedative, as is the case with the English manga), which involves Chopper injecting a substance, possibly an anesthetic, into the opponents body making them faint. This was first used on Luffy when he had a hallucination of a tsunami about to hit them while walking to Yuba in the Alabasta Desert, and it was later used in order to stop a group of rampaging giant children on Punk Hazard, with some assistance from the G-5 Marines.

After the two-year timeskip, he is seen being able to perform formidable martial art maneuvers with his new form called, "Kung Fu Point", and is now able to produce a new "Horn Point" with larger "Stag Beetle" like antlers which are useful for digging in the ground at high speeds, along with a new and improved "Guard Point" which is now able to grow big and strong enough to protect the Thousand Sunny from one of the Kraken's tentacle's. He also tells of how he only needs the Rumble Ball for one of his forms which was revealed to be his unnamed, "Monster" form.


  • Inability to swim: As a devil fruit user, Chopper cannot able to swim and leaving him drowning.
  • Seastone: Like other devil fruit users, Chopper is vulnerable to Seastone.
  • Haki Users: As a devil fruits, Chopper is more vulnerable to Busoshoku Haki users.


  • In the third character popularity poll of One Piece, Chopper ranked at #4 with 2725 votes, just topping Nico Robin with 2644 votes and distantly behind Sanji's 6235 votes. He was described as "Majorly popular for his cuteness and drive!"


           One Piece Logo.png Heroes

Straw Hat Pirates
Monkey D. Luffy | Roronoa Zoro | Nami | Usopp | Sanji | Tony Tony Chopper | Nico Robin | Franky | Brook | Jinbe

Revolutionary Army
Monkey D. Dragon | Sabo | Koala | Karasu | Emporio Ivankov

Sengoku‡| Monkey D. Garp | Smoker | Tashigi | Koby | Donquixote Rosinante† | Kuzan‡ | Regis | Issho

Shanks | Edward Newgate

Crocodile‡ | Boa Hancock‡ | Jinbei‡ | Trafalgar D. Water LawDracule Mihawk

Devil Fruit Users
Monkey D. Luffy | Tony Tony Chopper | Nico Robin | Brook | Portgas D. Ace† | Trafalgar D. Water Law | Donquixote Rosinante† | Edward Newgate† | Boa Hancock | Boa Sandersonia | Sengoku | Kuzan | Viola | Smoker | Sabo | Crocodile | Magellan | Kin'emon | Kozuki Momonosuke | Bentham | Jozu | Marco | Bartolomeo | Leo | Yamato

Riku Dold III | Viola | Nefertari Vivi | Shirahoshi | Rebecca | Sai

Amazon Lily/Kuja Tribe
Boa Hancock | Gloriosa | Boa Sandersonia | Boa Marigold | Marguerite | Poppy | Ran | Cosmos | Daisy | Kikyo | Aphelandra | Blue Fan | Belladonna | Nerine | Pansy | Enishida | Sweet Pea | Rindo | Dahlia

Whitebeard Pirates
Edward Newgate† | Marco | Portgas D. Ace† | Jozu | Izo | Little Oars Jr.

Red Haired Pirates
Shanks | Benn Beckman | Lucky Roo | Yasopp | Rockstar

Kozuki Clan/Nine Red Scabbards
Kozuki Oden† | Kozuki Toki† | Kozuki Momonosuke | Kin'emon | Inuarashi | Nekomamushi | Kawamatsu | Ashura Doji | Denjiro | Kikunojo

Silvers Rayleigh | Shakuyaku | Bepo | Hatchan | Carrot | Vinsmoke Reiju | Gol D. Roger† | Portgas D. Rouge† | Paulie | Iceburg | Yamato | Kappa | Apis | Kaya | Otohime† | Scarlett† | Nojiko | Seira | Hiramera | Mero | Trafalgar Lami† | Chao | Mousse† | Takao | Russian† | Johnny | Kobato | Desire | Luca | Ann | Livia† | Donquixote Homing† | Amanda | Ever | Carina | Uta