Chopper ( clone trooper ) / Legends " Chopper " was the nickname of a clone trooper who served in Clone Sergeant Slick ' s platoon during the Clone Wars . An aggressive soldier , Chopper was scarred during a battle droid ambush on Geonosis , and he came to hold a personal grudge against his Separatist adversaries . In 22 BBY , he was dispatched with a Jedi - led contingent of the Grand Army of the Republic to liberate the planet Christophsis from the Confederacy . When the Separatists foiled the Republic ' s attempt to ambush them , Chopper and his unit were forced to retreat with the rest of the Republic troops back to their base . While there , Chopper secretly made war trophies out of droid fingers pilfered from the battlefield , an exploit he was later forced to disclose when his superiors , Clone Commander CC - 2224 and Clone Captain CT - 7567 , interrogated his unit to root out a potential Separatist spy . Although Slick framed Chopper to be the enemy agent , the sergeant himself was revealed to be the turncoat and was apprehended after sabotaging the Republic ' s military supplies . Biography . The trooper nicknamed " Chopper " was cloned from the Mandalorian bounty hunter Jango Fett on the planet Kamino to serve in the Grand Army of the Republic . During the course of his service in the Clone Wars , he sustained heavy scarring from a battle droid ambush on Geonosis , and his right eye was also discolored from a head injury earned in battle . Chopper came to hold the battle droids of the Separatist Droid Army in contempt , and he even began to take the war personally . He was eventually assigned to Clone Sergeant Slick ' s platoon . In 22 BBY , seven weeks into the war , the platoon was dispatched with a contingent of the Republic Army to liberate the planet Christophsis from the Confederacy of Independent Systems . On Christophsis , Slick ' s unit was tasked with reconnoitering the planet for a suitable site that the Republic could use to ambush the droids , and Chopper and his comrades set off on BARC speeders to scout out some potential locations . In the planet ' s capital , Crystal City , the clones found a candidate for an ambush site : a business center overlooking a large plaza with towers facing the north and south . After reporting their success to their Jedi Generals , Obi - Wan Kenobi and Anakin Skywalker , Slick and his men returned to the Republic base . Along the way , the platoon chanced upon a squad of B1 battle droids that was clearing a major boulevard of Christophsian civilians , and Slick had Chopper and fellow trooper Sketch keep an eye on the droids while the clones parked their speeder bikes . When the battle droids came across a crippled Christophsian and discussed killing the man , the clones intervened and eliminated the droids . Yet , Chopper was disgusted with the crippled refugee ' s cowardice and threw a battle droid leg at him , insulting him and rudely telling him to use it as a crutch . He then returned to the Republic base with his platoon . With the information that Slick and his unit had gathered , the Republic forces put their plan to ambush the droids into action . Chopper and the rest of Slick ' s unit were stationed in the south tower with Kenobi and Clone Commander CC - 2224 , while Skywalker and Clone Captain CT - 7567 were based with their troopers in the parallel north tower . As the Republic troops prepared to attack the Confederate droids below , however , the approaching droid column suddenly split in two , and battle droids launched an assault on the clones in the south tower , compromising the Republic ' s position . That change of events forced the Republic troops to abandon their ambush plan and regroup in the south tower , from the roof of which the Jedi and clones retreated in clone pilot Hawk ' s LAAT / i gunship . After the Republic forces had returned to their base , Chopper skulked around the base ' s south exit and privately strung several battle droid fingers — items that were forbidden by war protocols to be taken from a battlefield — together in a necklace as war trophies . He later joined fellow platoon members Sketch and Punch in the base ' s mess hall . Chopper and the others were eventually recalled to their barracks along with the rest of their unit so that CC - 2224 and CT - 7567 — nicknamed " Cody " and " Rex , " respectively — could interrogate them . The two clone officers were after a suspected Confederate spy amongst their ranks , and their tracing of an irregular wavelength in external communications to the platoon ' s barracks had led them to surmise that one of Slick ' s men was the Separatist agent . Rex and Cody began to question each of the troopers , and when it was his turn , Chopper hid his droid finger necklace and claimed that he had immediately gone to the mess hall after returning to the base with the others . However , Sketch challenged his alibi and cited that Chopper had not joined them in the mess hall until much later , forcing Chopper to reveal his protocol - breaking actions . Slick used Chopper ' s lie as evidence in accusing him of being the spy , but when his sergeant stated that he would be given a proper investigation when the Jedi returned , Chopper retaliated , recalling that he had witnessed the sergeant entering the base ' s command center instead of his platoon ' s barracks earlier that evening . That , along with Slick ' s inadvertent revelation of his awareness that the Jedi had left on a confidential mission , prompted Cody to confront Slick on his knowledge of the restricted information . Briefly admitting to his allegiances as a Separatist spy , Slick knocked Cody and Chopper over before fleeing the barracks , leaving his platoon shocked with the revelation of their sergeant ' s treason against the Republic . After severely damaging the Republic ' s gunships , AT - TE walkers , and weapons depot , Slick was spotted running into the base ' s command center . With Slick ' s platoon securing the perimeter , Rex and Cody managed to apprehend Slick and turn him in to the Jedi . Personality and traits . An unusual clone with an odd personality , Chopper took a personal stance in the war . He held a grudge against the battle droids of the Separatist Army , believing that the machines that had caused his scarring owed him something . His hatred for the droids led him to express some crude humor to a crippled Christophsian whose cowardice he considered to be repugnant . In battle , the other members of his unit felt that Chopper gunned down battle droids with a frightening mixture of joy and rage , and his comrades thus deemed him to be rather peculiar . To fuel his contempt for his mechanical adversaries , Chopper stole fingers from droid wreckage on the battlefield and made grim war trophies out of them . He additionally attempted to hide his crime by both sequestering himself when making a droid finger necklace , and using a false alibi to mask his whereabouts during Rex and Cody ' s interrogation . He was even willing to lie to his commanding officers to hide his violation of protocol , though he was not successful in covering up the truth . In the opinion of fellow trooper Gus , Chopper ' s actions represented a form of deficiency . When his trustworthiness and character were questioned by Sergeant Slick , Chopper appealed to Rex and Cody , his commanding officers , to attempt to make his voice heard over his sergeant ' s accusations . When Slick continued to put him on the spot , however , the cornered Chopper rounded on his own sergeant and was quick to put the spotlight on him , aggressively questioning the officer ' s own whereabouts . The trooper ' s pursuits played a key role in revealing Slick ' s role as a Separatist spy . A Human male , Chopper dyed and shaved his hair , though he attained severe facial scarring and eye discoloration in the course of his service . He stood 1 . 83 meters tall and had tan skin . He was trained in combat , to the point that Slick deemed his skill to be noteworthy , and he was additionally skilled with machines . He wielded a DC - 15S in combat . Behind the scenes . The character of Chopper was created for the . He first appeared in " " and the episode it led into , " The Hidden Enemy , " which aired on February 6 , 2009 as part of the television series ' . He was voiced by Dee Bradley Baker and served as the prime Separatist spy suspect in the episode before the traitor was revealed to be Sergeant Slick . Numerous source material , including " " , " " , and " " , served to expand his character . Chopper was originally to appear in another scene of " The Hidden Enemy , " during the Republic forces ' preparations in the South tower for an attack on the Separatists . He was to help set up a sabotage droid nicknamed " The Beast " that was to lure the battle droids into the Republic ' s ambush . His visible attachment for the droid would have been a direct contrast with his willingness to " casually " disobey war protocols with his construction of his battle droid finger necklace later in the episode . As indicated by the script , the Beast would be unsuccessful , and the clones would be forced to retreat . Nevertheless , the scene was ultimately cut to keep the battle focused on the " clones versus droids " perspective , and not the confusing element of the clones themselves utilizing a droid against the Separatists . Chopper ' s right eye changes color during " The Hidden Enemy . " Both of his eyes are the same brown color until Slick puts his character into question . From then on in the episode , his right eye is a light yellow color , an indication to one of the numerous injuries he received earlier in the war .