R3 - S6 R3 - S6 , also known as " Goldie " or " Stubby , " was an R3 - series astromech droid assigned to Anakin Skywalker during the Clone Wars to replace his lost astromech droid , R2 - D2 . Serving as a double agent for the Separatists , R3 - S6 often sabotaged Republic missions . Biography . The search for R2 . Following the loss of R2 - D2 during the Battle of Bothawui , R3 - S6 was assigned to Jedi General Anakin Skywalker as a replacement . R3 , secretly an agent of Separatist leader General Grievous , accompanied Skywalker and his Padawan , Ahsoka Tano , as they searched for R2 . In an attempt to gain Skywalker ' s appreciation for R3 , Tano nicknamed the droid " Goldie , " pointing out that Skywalker was Gold Leader of Gold Squadron . Despite this , Skywalker still disliked R3 , giving him the name " Stubby , " as he felt something suspicious about the droid . While searching the remains of the battle , the trio encountered a Trandoshan scavenging freighter . Believing the vessel may have collected R2 , the group boarded , and were welcomed by Gha Nachkt , who claimed R2 was not aboard . Nonetheless , they continued to browse the scavenger ' s collection . Eventually , they gave up their search and returned to Skywalker ' s Corellian freighter , the " Twilight " . Confederate agent . Unbeknownst to Skywalker , R2 - D2 was aboard Nachkt ' s freighter , as the Trandoshan intended to sell the droid to Grievous for the vital information it contained . As Nachkt neared Skytop Station , a Confederate listening post , R2 sent a message to the " Twilight " , allowing Skywalker to track him . Skywalker , Tano , R3 - S6 , and a group of clone trooper s infiltrated Skytop Station , where Skywalker set off in search of his droid , and the rest set out to destroy the station ' s reactor s . While Tano and the clones were distracted , R3 contacted Grievous , alerting them of the Jedi ' s presence . The general soon arrived , separating Tano and R3 from the clones . As Tano hid from Grievous , R3 revealed her location , and a brief lightsaber duel ensued before Tano fled . Tano , now aware of R3 ' s allegiance , attempted to reunite with her team in the station ' s hangar . However , R3 reached them first , proceeding to close the hangar door and activate three vulture droids . Concluding that R3 was a spy , Skywalker ordered the recently found R2 - D2 to reopen the doors so they could escape the exploding station via the " Twilight " . Duel with R2 - D2 . R3 followed R2 to the catwalk where the access port was located , and the two astromech droid s battled for control of the access port to the hangar doors . A variety of tools were used by both droids in the fight . After R3 bashed into R2 to interrupt his interface with the access port , both droids produced an electro - shock prod and tried to electrocute the other , but as the arcs clashed , the droids were at a stalemate . R2 then sprayed oil at R3 and ignited it with his rocket booster . While R3 was reeling from the flames , R2 tried to bash him off the catwalk but as he began to fall R3 fired his tow cable at R2 to secure himself . R3 dangled helpless for a moment before R2 produced a circular saw to cut the cable , and R3 tumbled from the catwalk before being struck by debris from the falling station and destroyed . Characteristics . R3 - S6 was an R3 - series astromech droid with masculine programming manufactured by Industrial Automaton . He served Grievous of the Confederacy of Independent Systems , feigning incompetence to sabotage missions of the Galactic Republic . Equipment . Like many other astromech droids , R3 - S6 was equipped with a computer interface arm , an electro - shock prod , a holoprojector , a retractable third leg , and a scanner antenna . Behind the scenes . R3 - S6 was created for the animated television series " " , being first mentioned in the Legends sourcebook " " and first appearing in the series ' sixth episode , " Downfall of a Droid , " in 2008 .