Clans: beast
Tony Tony Chopper is the doctor of the Straw Hat Pirates. Chopper is a reindeer that ate a Devil Fruit called the Hito Hito no Mi. He came from Drum Island where he learned how to be a doctor, which also makes him the only member of the Straw Hat Pirates who was born on the Grand Line
Abilities
Chopper has eaten a Zoan-class Devil Fruit (the second Zoan-class Devil Fruit shown in the series, after Dalton) known as the Hito Hito no Mi, which allows him the ability to transform into a human and human-reindeer hybrid at will. However, the fruit has granted Chopper more than just the ability to transform; it has also given him human intelligence, which allows him to both speak and think like an actual human. This is what allowed Chopper to become a doctor and learn about medicine in the first place, which is impossible for a normal reindeer. While Chopper is usually seen in his human-reindeer hybrid form, which is a tanuki-like chibi-creature, he would sometimes transform into his human form to try and fit in with humans, often with minimal success. But when in combat, he also uses his Devil Fruit powers in order to fight his enemies with the strength given to him by the fruit and usually transforms into whatever form best suits the situation.
Rumber Ball
in addition to his three forms granted by his Devil Fruit, Chopper has also invented a yellow jaw-breaker like drug called the "Rumble Ball", through some research. This drug has the power to distort the wavelengths of the Devil Fruit's transformation, allowing him access to additional transformations for three minutes.
However, due to the risk of this alteration, the Rumble Ball's consumption must be closely monitored, and for this reason Chopper cannot consume more than one every six hours. If he takes a second one, his transformations would become out of control. And if a third one is taken, Chopper transforms into a massive, berserk monstrosity (as witnessed at Enies Lobby and Sabaody Archipelago) with equally monstrous strength that requires lethal amounts of energy to keep active, making Chopper a danger to both himself as well as others.
Chopper could transform into five different forms under the influence of the Rumble Ball: Jumping Point, Guard Point, Arm Point, Brain Point and Horn Point. After the two-year timeskip, he is seen being able to perform formidable martial art maneuvers with his new form called, "Kung Fu Point", a melding of Arm Point and Jumping 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. In addition, he is able to utilize those forms without consuming a Rumble Ball; instead, eating a Rumble Ball now allows him to enter his most powerful form, Monster Point, and fight in it for three minutes. How he managed this is currently unknown
Story Detail
Chopper was originally a reindeer with the slight oddity of a blue nose, which caused other reindeer, even his parents, to treat him as an outcast . When the young reindeer ate the Hito Hito no Mi, however, his herd ostracized him (and with the increase in intelligence granted by the fruit, now acutely aware of it), and he struck out on his own. Unfortunately for Chopper, his attempts at communicating with the humans on Drum Island proved disastrous; villagers who mistook him for the Abominable Snowman shot him
Luckily, though, he was rescued by the quack Dr. Hiluluk, who named him and took him in as his friend and "assistant". Although his deeds were of dubious medical value, Hiluluk became Chopper's role-model. Hiluluk taught Chopper his philosophy on life (that all diseases could be cured) and his strong faith in the Jolly Roger as a symbol of strength against all odds. The two went from house to house, administering their "cures" in a country where all doctors not sanctioned by King Wapol were banned.
When Hiluluk's health worsened, Chopper was left in the cold again as the old man did not want Chopper to watch him die. Once Chopper found out what had happened, however, he vowed to find a cure for his mentor, his one and only friend. He soon found the cure he was looking for: an Amiudake, a special kind of mushroom with skull-and-crossbones prominently displayed in the medical book (although unaware of what that sign meant medically due to Hiluluk's praising of pirates and the jolly roger). Remembering what he overheard by some villagers that a "certain" type of mushroom can heal every illness, Chopper steals Hiluluk's favorite medical book to find the miracle mushroom. Chopper's arduous journey was a success, even though he risked his life and suffered many injuries, the worst of which occured when during his journey into the wilderness, in order to get to the mushroom, which was growing atop a treacherous cliff, he had to cross through the territory of his old herd
Hiluluk, overwhelmed with tears of gratitude, ate the mushroom to show his love and appreciation to Chopper, (despite knowing that it would end his life) but Chopper would later find out from Dr. Kureha that he had given Hiluluk a fatal dose of poison. But Hiluluk was not to live much longer anyway. Declaring that he had a wonderful life (in the 4kids dub he declares he is a doctor) and after thanking Chopper, he committed suicide by blowing himself up outside of Drum Castle with a failed potion (before being killed by the poison, for Chopper's sake). Chopper, who had arrived to try and save him, was so upset over Hiluluk's death that and so angry that Wapol was making fun of it that he went completely berserk and tried to attack him, losing all control and running toward Wapol with a terrifying beastly roar. Dalton, who had heard Hiluluk's last words and realized that the monster he called his son was trying to attack Wapol he then stopped him. He then, with tears in his eyes, told him that he apologized for those who mocked Hiluluk's death but that he could not beat Wapol if he could not beat him. Chopper was brought out of his rage and then began to tear up as well at these kind words. He went to Kureha, waving Hiluluk's Jolly Roger outside her house and sobbing heavily, vowing that he would become a great doctor.
Chopper is first seen following Kureha when she visited Cocoa Weed. She noted inflammation in Tamachibi's limbs and diagnosed a bacterial infection in his bones. With the villagers infuriated by Kureha's exorbitant fee, Chopper prepared to fight them but Kureha told him not to attack. Kureha and Chopper left with the supplies and money
