Chopper is the most useless member of the Strawhats, who time and time again proves he is not only useless as a fighter, Doctor, but is actually a liability.
Fishman Island.
Chopper proved in Fishman Island that even at the most basic level, he by himself cannot do anything.
As a Doctor, He was unable to actually do anything to help his crew mates without others coming to help.
(Jinbei saving Luffy not Chopper)
As a Fighter,
During Punk Hazard.
Chopper was at his whiniest.
And who was it who saved the Children.
During Dressrosa
Chopper once again shows he is a liability.
While Sanji,
Lead the counter attack and successfully escaped from Big Mom's Ship.
During Zou, Sanji again lead the crew and Ceaser, in successfully saving the Minks and fighting off the remains of the Beast Pirates.
And in WCI.
Chopper proved that he is the biggest liability in the Series, killing Pedro.
Fishman Island.
Chopper proved in Fishman Island that even at the most basic level, he by himself cannot do anything.
As a Doctor, He was unable to actually do anything to help his crew mates without others coming to help.
(Jinbei saving Luffy not Chopper)
As a Fighter,
![](https://i.imgur.com/WbqbZvT.jpg)
During Punk Hazard.
Chopper was at his whiniest.
And who was it who saved the Children.
![](https://i.ibb.co/P1TN062/0688-016.png)
![](https://shannaro.files.wordpress.com/2012/11/s019.jpg)
During Dressrosa
Chopper once again shows he is a liability.
![](https://static.wikia.nocookie.net/onepiece/images/4/4c/Dying_Art.png/revision/latest/scale-to-width-down/340?cb=20140714072247)
While Sanji,
Lead the counter attack and successfully escaped from Big Mom's Ship.
During Zou, Sanji again lead the crew and Ceaser, in successfully saving the Minks and fighting off the remains of the Beast Pirates.
![](https://pm1.narvii.com/5809/d58472f8d06d4c9083f7aae6cc61d6332ff8c13b_hq.jpg)
And in WCI.
Chopper proved that he is the biggest liability in the Series, killing Pedro.
![](https://i.imgur.com/Quy0vNJ.jpg)