Devil Fruits are one of the main elements constituting One Piece's lore. Each of the three types boasts unique characteristics, both in terms of aesthetic and power. Even though the typical Zoan Devil Fruit doesn't give much of a power-up, they all have appealing transformations. This is especially true for Ancient Zoans like X-Drake and Mythical Zoans like Kaido. But when it comes to the number of transformations, no one can beat the Straw Hats' very own doctor, the adorable Tony Tony Chopper.
Chopper is a reindeer who ate the Human-Human Fruit, which allowed him to have a human form. But unlike other Zoan users, Chopper has multiple transformations in contrast to the usual three forms. He needed to eat a Rumble Ball to access most of his transformations prior to the time-skip, but he managed to master most of his transformations without any stimulus after the time-skip. Here are all of Chopper's numerous transformations, which he refers to as points.
Brain Point
Brain Point is Chopper's most-used transformation, which is a hybrid of his human and reindeer forms. It's one of the forms that did not require a Rumble Ball's effects to manifest even before the time-skip. This transformation gives the doctor a tiny body and a disproportional head. But since he can use both his human intellect and his animal instincts in this form, this is what he uses to conjure his brightest plans. In addition, Chopper often uses this form's small physique to evade his opponents' attacks, but its short stature also often results in him being mistaken as a tanuki. He can also use Scope, a technique wherein he concentrates on a target to scan for their weakness, after consuming a Rumble Ball. However, Chopper is yet to use this technique post time-skip as he currently saves his limited Rumble Ball consumptions for the direst of occasions.
Walk Point
Another one of Chopper's commonly-used transformations, Walk Point is his typical reindeer form. He appears just like an ordinary reindeer when using this, except that his nose is blue. This is noted to be the only form that ages as Chopper get older. Chopper was akin to a faun in this form when he was 9-years old, and he started to grow fur around his shoulders at 15-years old. After the time-skip, which was his 17th year of existence, he became more stag-like. He had bushier fur and a big-enough physique for others to ride on him.
Walk Point is Chopper's fastest form, so he commonly uses it when traveling on foot. He also relies on this to run around the battlefield if need be. Finally, he uses his sensitive reindeer sense of smell to track both friend and foe alike.
Heavy Point
Heavy Point is Chopper's human form, wherein he loses most of his reindeer features except his blue nose and fur. Chopper gains a buff body with huge arms, complete with digits instead of hooves. Before the time-skip, Chopper retained the fur around his neck, but it became a furry ruff after his two-year training.
The muscles he acquires in this form aren't just for show. They pack a solid punch, further exaggerated after his time with the residents of Torino Kingdom, and can also withstand a couple of solid hits. It also comes with fair agility, which allows him to match most of his opponents' speed. There are also a few rare occasions when Heavy Point's weight becomes crucial when dodging an attack as it can hasten the reindeer's fall. Naturally, Chopper often uses this when fighting and carrying heavy luggage.
Guard Point
By turning into a literal ball of fur, Chopper achieved his Guard Point. He grows his fur to the point that only his head and two of his legs can be seen. Chopper's Guard Point wasn't able to grow bigger than a person prior to the time-skip, but this changed after the two years he was away. At that point, he was able to grow big enough to cover half of Thousand Sunny's deck and protect it from a Kraken attack.
Guard Point is one of Chopper's transformations that initially required a Rumble Ball. It has a very high defense, and it was strong enough to withstand an attack from Big Mom. However, this form's blatant weakness is its lack of attack power. The Straw Hats' doctor has to assume another transformation to deal any sort of damage. And even though it's almost an impenetrable wall, it doesn't nullify all attacks. Chopper can still be injured if his opponent's attack exceeds the threshold his fur can absorb, and it is also highly susceptible to fire due to obvious reasons.
Horn Point
This form takes a similar appearance to his Walk Point, but with visibly larger horns. Chopper retaind his human hands and reindeer-like face in this form before the time-skip. Its appearance drastically changed during the two time periods, and his hooves make a comeback replacing the fingers from his pre-time-skip Horn Point. The bulging horns of this mode offer great offensive power and also allow the reindeer to dig by using it as a shovel.
Jumping Point
This is one of the two forms that Chopper seemed to have discarded during his two-year absence. This form takes the appearance of a slender human-like upper body and reindeer legs. This allowed Chopper to reach great heights when jumping and elude a lot of his enemies. While this allowed him to gain a sleight battle advantage, it proved useless against opponents that can maneuver in mid-air. Worse is that he doesn't have any strong attacks while in this form.
Arm Point
Arm Point was another form that was lost after the time skip. By taking a Rumble Ball, Chopper's arms became extremely muscular. This left him much stronger than before and increased his attack power enough to break a huge boulder with one punch. It was also durable enough to withstand an attack from Chessmarimo. Naturally, Chopper only employed this form during serious fights.
Kung Fu Point
Contrary to the two forms above, Chopper only acquired Kung Fu Point after his training at the Torino Kingdom. He assumes a wide body and a head with stretched-out facial features, which resembles the human inhabitants of his training ground. This became one of Chopper's go-to transformations for fighting after the time-skip as he becomes very proficient in martial arts when assuming this appearance. That means he can move about and even perform multiple somersaults, while also executing a combo attack or two. An attack from this form was strong enough to break giant steel doors.
Monster Point
Monster Point is undeniably Chopper's strongest transformation. However, it has specific requirements, which always involved the Rumble Ball. Before the time-skip Chopper needed to consume three Rumble Balls within six hours to access this mode, but it's wasn't necessarily a blessing. This form granted him immense strength and a very tanky build, but he used to lose his consciousness and turn into a rampaging behemoth.
He did become able to control this form for three minutes at most with the help of one Rumble Ball after the time skip. This enabled him to fight at will and even communicate during that short period of time. However, he wouldn't be able to move for around 2-3 hours once his time was up. Caesar Clown eventually helped him upgrade his Rumble Ball, which then allowed him to use this form for 30 minutes at most. Naturally, a new side-effect also came with it.
Bonus: Baby Geezer
After Chopper's 30 minutes with the Monster Point is up, he becomes a small being that can fit the palms of a normal-sized human. He's very vulnerable in this form and also speaks like an old man, thus the name.