While developing a potion to create cherry blossoms when in contact with snow, Chopper is heartbroken when Hiriluk falls ill with a deadly disease.

140] A running gag within the series is when other characters mistake him as a Tanuki, and he angrily corrects them, pointing out that he is a Tonakai (Japanese for "Reindeer").

[5][6][7] When asked by a fan what the nationalities of the members of the Straw Hat Pirates would be if One Piece was set in the real world, Oda replied that Chopper would be Canadian.

406] If Chopper consumes three Rumble Balls within six hours, he grows to monstrous proportions and loses all self control and consciousness.[ch.

646] Later with the help of their enemy and temporary prisoner Caesar Clown, Chopper was able to improve the formula and lengthen the effects of the Rumble Ball ten-fold to thirty minutes at a time[ch.

1014], albeit with new side-effects of Chopper temporarily shrinking down to an infant-like form, known as Baby Geezer, with antiqued speech.[ch.

He grew up an outcast until taken in by the fake doctor Hiriluk, a former thief, who accepts Chopper as his son to instills within him his initial passion for medicine.

A frightened Chopper continues to give Luffy the slip and later explains he can't be part of the crew because he is a monster.

[12] Chopper is the doctor of the crew and has outstanding knowledge of medicine and medical drugs, as well as the preparation of remedies and ointments from regular fruits, roots and vegetables found on most islands.

His power ranking is classified as Class A, with attack potency ranging from Large Building to City Block level.

[13] Chopper found a genuine feeling of family after joining the Straw Hats, where his friends encourage him as a person and as a doctor.

He treats injuries and illnesses and creates antidotes in emergency situations because of his medical knowledge and charming demeanor, which makes him a vital member of the crew.

During the Punk Hazard arc, one of his greatest accomplishments was developing an antidote to protect youngsters Caesar Clown experimented on.

He is featured in most of the One Piece films starting with Movie 3: Chopper's Kingdom of Strange Animal Island, where he is the main character.

Chopper was seen in Bokusatsu Tenshi Dokuro-chan when Sakura mentions "reindeer who are doctors" and other things from anime, while he was freaking out in a forest.

Unfortunately for him, he can't quite hide away … it's easy to understand why most characters who see him for the first time tend to think that he's a tanuki (or a raccoon dog).

Dyler Crews wrote, "Even before Pikachu solidified the concept of a manga and anime franchise having an adorable mascot in the '90s, the trope was already old hat.

[31][32][33][34][35][36][37] The denouement of Chopper's introduction arc was rated the ninth most heartbreaking scene in One Piece, and Chopper was involved in half of the top ten most heartbreaking scenes in the manga: the Going Merry's funeral, Robin saying she wants to live, the Straw Hats' departure, the Going Merry rescuing the Straw Hats, and the aforementioned denouement, when Kureha fulfills Hiriluk's dying wish by making Drum "bloom" like a Sakura tree.