Zoan Devil fruitsare having a moment inOne Pieceright now, thanks to the Kaido and his crew being users of them. Most Zoan devil fruits allow their users access to three forms: their original form, an animal form, and a hybrid of the two.

Tony Tony Chopper, the Straw Hat Pirates' doctor, is different. He has so far revealed a staggering 10 forms that come from his use of theHito Hito no Mi (Human-Human Fruit). Here’s a breakdown of each form and how it works.

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Chopper’s Basic Forms

Chopper is a blue-nosed reindeer from the wintry Drum Island, and thus his true form is that of a fairly large-sized deer. He calls this form the Walk Point. Chopper uses this form primarily for transportation, as he can run faster than most of his other forms using Walk Point. He also uses it to disguise himself because he can pretend to be a simple animal in that form.

Chopper’s Heavy Point is technically his “Human Form” but he looks more like a yeti or Sasquatch due to being covered in fur. Except for his Monster Point, this is Chopper’s largest form, and he is significantly taller than regular-sized men likeLuffy, Zoro, and Sanji. The heavy point is capable of immense strength, but is not as strong as some of Chopper’s other offensive forms.

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Rounding out Chopper’s basic forms is his hybrid form, which he calls the Brain Point. This is the formChopperuses most often when not in battle. He is incredibly small in this form, just under 3 feet in height. On the rare occasions he uses it in battle, it’s to scope an opponent’s weakness or to dodge an attack that would have hit a larger form.

Extra Forms

After conducting extensive research, Chopper developed a drug called the Rumble Ball, which initially gave him access to another four forms by altering the wavelength of hisDevil FruitPowers. Each of these forms carries out a specific function in battle, and Chopper could freely switch between them for a period of three minutes. When using the Guard Point, Chopper’s fur grows out in a giant ball, obscuring everything but his face and legs. The hair protects him from most blunt injuries, althoughChopperremains vulnerable to fire in this form. He also seems to be unable to fight back directly against enemies while using Guard Point, and thus usually uses it only for a few seconds at the moment he is attacked.

The Horn Point makes Chopper’s antlers grow dramatically in size, allowing him to use them as weapons in battle or to dig through the ground. After the time skip, this form changes dramatically, with the antlers becoming longer but less spread out, similar to stag beetle, and Chopper’s face resembling his Brain Point more than his Walk Point. The Jumping Point greatly augments the strength of Chopper’s legs, allowing him to leap great heights with ease. This is one of the forms he has used the least, and so far he has not been seen using it to attack. It appears to largely be an evasive maneuver. The Arm Point, on the other hand, is one ofChopper’s most powerful forms.

Chopper stands upright like a human as with his Heavy Point, but most of his muscle mass is concentrated in his arms, rather than distributed more evenly across his body. Additionally, he retains the hooves of his reindeer form, while his Heavy Point has human-like fingers. Chopper’s power in this form is so great that he managed to form a giant hoof-shaped indent in the zombified giant Oars. After the time skip, Chopper also develops a new form, the Kung-Fu point. Chopper is relatively short and pudgy in this form, but can move with surprising speed, using Kung-Fu to attack enemies. This form seems to have replaced the Arm Point after the time skip as one of Chopper’s primary offensive forms.

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Prior to the time skip, Chopper could only eat one Rumble Ball in six hours without incurring any side effects. A second Rumble Ball would cause him to lose control of which transformations he changed into, and a third would turn him into a giant, mindless beast. This last form is the Monster Point. When in this form, Chopper grows to nearly thirty feet in height, and gains frightening strength. This form is so powerful that it managed to throw theCP9agent Kumadori literally miles away, and allowed him to go head-to-head withQueen, an extremely powerful pirate with a bounty of over 1.3 billion berry. Initially, Chopper had no control over this form and would attack friends and foes indiscriminately. After the timeskip, he has full control over himself, making him a much more effective fighter overall. With additional research, Chopper eventually managed to extend the effect of his Rumble Ball to 30 minutes, allowing him to use the Monster Point ten times longer than before. This enhancement, however, comes at a price.

Enter the Babyjiji form. Similar to how Luffy would shrink after using Gear 3 prior to the timeskip, Chopper now shrinks after using the new Rumble Ball. For 15 minutes, Chopper is small enough to fit in the palms of an average person’s hands, and speaks with a distinctive old man voice. He appears to be completely vulnerable in this state. Chopper’s research could uncover even further forms and variations of his Devil Fruit, including something which may eventually surpass the Monster Point. What can be definitively stated at this point is that Chopper’s research has dispensed with the notion thatZoan usersare limited to three forms, and that with pharmaceutical intervention a whole new range of powers is open to them.