Tony Tony Chopper is an extremely adorable reindeer and the doctor of the Straw Hat crew . He can change his size and become bigger to fight. For many fans, Chopper is not as prominent as the other members and does not have many outstanding achievements. However, the article below will change their prejudice on that issue.
Chopper saves Nami from Kumadori
CP9 is a secret assassin organization of the World Government's Cipher Pol, which has some extremely dangerous members. Although Kumadori is not the strongest member, he posed a serious threat to the Straw Hats during the events of the Water 7 Arc. Equipped with a Rokushiki and superhuman physical abilities, Kumadori even nearly killed Nami, but Tony Tony Chopper intervened in time.
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Kumadori pushed Chopper to his limits and nearly defeated him before the Straw Hats' doctor swallowed the third Rumble Ball, achieving his current iconic form known as "Monster Point".

Chopper Overcomes the Swamp
Luffy's crew has faced many challenges during their adventures in Skypeia, and Tony Tony Chopper is no exception. After being separated from his friends in a survival game set by Enel, Chopper is forced to overcome the Swamp Trials by defeating the high priest of the place, Gedatsu.
Obviously, the doctor's strength was no match for Gedatsu's, but he skillfully relied on his spiritual strength to defeat the boneheaded priest, eventually disarming one of the Jet Dials that had been attached to Gedatsu's leg. Tony Tony Chopper didn't have as many opportunities to shine in one-on-one combat as most of the other Straw Hats, so this was a huge achievement for him.
Tony Tony Chopper takes down an officer in the new world
Entering the New World Arc, the One Piece series takes a different turn forever, putting Luffy and his crew in more dangerous situations than ever before. They have to face some of the most powerful enemies in the world. Fishman Island is the first new island that Chopper and the Straw Hats visit after the timeskip.

As you may know, before the timeskip, Chopper was unable to control Monster Point, his strongest form. Currently, Chopper has proven his complete mastery of its abilities by easily defeating Dosun with a single blow in his transformed state.
Excellent medical ability
Nami contracted a rare disease from an insect bite while in Little Garden before visiting Tony Tony Chopper's home, Drum Island, resulting in her dire condition upon arriving in the snowy land.
The Straw Hats are in dire need of a medical professional in a country with almost no doctors, so Chopper's ability to help Nami is crucial to the future of the crew. Chopper's presence in the One Piece movie is essential, because no crew member is immune to illness.
Chopper fights off two Baroque Works agents on his own.
Crocodile's influence over the kingdom of Alabasta was immense, with Baroque Works agents infiltrating every level of the desert kingdom's command structure. These guys were incredibly powerful, yet Tony Tony Chopper had to single-handedly take on both of them at the same time.
Mr. 4 and Miss Merry Christmas tailed Sanji and Chopper before Sanji left to find Princess Vivi. They timed their attack on Chopper when he was alone. Chopper held off until Usopp came to his aid, forcing viewers to acknowledge the Straw Hat doctor's strength.

Chopper unites a divided island
The Imperial Shichibukai (Bartholomew Kuma) is an impressive character for the characters in One Piece, he appeared in the events right before the timeskip. Previously, it was said that this “Tyrant” had destroyed the Straw Hat Pirates, forcing each of them to flee to different islands around the world.
However, later revelations in One Piece revealed that he had scattered the crew for their protection, sending each to a location suited to their personal growth. Tony Tony Chopper landed in the Kingdom of Turin and eventually united the people, settling a long-standing dispute between humans and giant birds there.
Help Zoro not die from injury
Zoro absorbed all the damage for Luffy on Thriller Bark. If it weren't for the intervention of a certain reindeer, he would have died from his injuries. Zoro and Tony Tony Chopper's relationship is more like brothers than members of a pirate crew.
Chopper defends himself against a Yonko's attack.
Big Mom occupies a rare position in the One Piece universe, holding the illustrious title of Yonko alongside Shanks, Kaido, and Blackbeard. Her strength is virtually unmatched, but Chopper, who is not the strongest of the Straw Hats, somehow repelled many of her attacks during the events on Cake Island.

Tony Tony Chopper Fights For His Home
When One Piece viewers were introduced to Chopper's homeland, it was under the control of the arc's main antagonist, Wapol. He used Wapol's Baku Baku no Mi, combining two of his strongest fighters into one: Chessmarimo. Despite having been abandoned by the people of Drum Island, the Straw Hats' doctor still decided to risk his life to fight.
Chopper Faces Off Against One of the Strongest Monster Pirates
The Wano Arc took the climax of the One Piece series to unprecedented levels, pushing Luffy's crew members to their limits. Tony Tony Chopper engaged in combat with Queen, the second-in-command of the Beast Pirates.
Queen was able to weaponize the Ice Oni virus, using it against the Wano liberators during her battle with Chopper. Fortunately, Tony Tony Chopper quickly developed antibodies against the virus during the fight and counterattacked Queen, bleeding Plague and cementing his status as one of the Straw Hat Pirates' most skilled members.

Although not as strong as the other members, Tony Tony Chopper also uses his own strength to help his teammates. His cute image has captured the hearts of many fans. Many anime have copied this formula, but few have been as successful as Eiichiro Oda.