<sod>:A genetically engineered [[raccoon]]-like alien who is a bounty hunter and mercenary, as well as a master of weapons and battle tactics.<ref name="StitchKingdom" /><ref name="MarvelSynopsis" /><ref name="CooperOfficial" /><ref name="Cooper" /> Gunn worked with live raccoons to get the correct feel for the character, and to make sure it was "not a cartoon character", saying, "It's not [[Bugs Bunny]] in the middle of the [[Avengers (comics)|Avengers]], it's a real, little, somewhat mangled beast that's alone. There's no one else in the universe quite like him, he's been created by these guys to be a mean-ass fighting machine."<ref name="GunnRocket" /> Describing Rocket in relation to the rest of the Guardians, Cooper said, "I think Rocket is dynamic. He's the sort of [[Joe Pesci]] in ''[[Goodfellas]]'' guy."<ref name="Cooper2" /> Cooper voiced Rocket, while [[Sean Gunn]] (James' younger brother) stood in for the character during filming.<ref name="RocketStandIn" /> James Gunn said that for the role of Rocket, some physical movement from Cooper, including facial expressions and hand movements, was recorded as potential reference for the animators,<ref name="2013NovDelToro" /> though much of Sean Gunn's acting is used throughout the film.<ref name="SeanGunnThanos" /> Before Cooper was cast, James Gunn said that it was a challenge finding a voice for Rocket, that he was looking for someone that could balance "the fast-talking speech patterns that Rocket has, but also can be funny, because he is really funny. But also has the heart that Rocket has. Because there are actually some pretty dramatic scenes with Rocket."<ref name="IGNRocketJun2014" /><eod>
<sod>:A genetically engineered [[raccoon]]-like bounty hunter and mercenary, and is a master of weapons and battle tactics.<ref name="StitchKingdom" /><ref name="MarvelSynopsis" /><ref name="CooperOfficial" /><ref name="Cooper" /> Gunn worked with live raccoons to get the correct feel for the character, and to make sure it was "not a cartoon character", saying, "It's not [[Bugs Bunny]] in the middle of the [[Avengers (comics)|Avengers]], it's a real, little, somewhat mangled beast that's alone. There's no one else in the universe quite like him, he's been created by these guys to be a mean-ass fighting machine."<ref name="GunnRocket" /> Describing Rocket in relation to the rest of the Guardians, Cooper said, "I think Rocket is dynamic. He's the sort of [[Joe Pesci]] in ''[[Goodfellas]]'' guy."<ref name="Cooper2" /> Cooper voiced Rocket, while [[Sean Gunn]] (James' younger brother) stood in for the character during filming.<ref name="RocketStandIn" /> James Gunn said that for the role of Rocket, some physical movement from Cooper, including facial expressions and hand movements, was recorded as potential reference for the animators,<ref name="2013NovDelToro" /> though much of Sean Gunn's acting is used throughout the film.<ref name="SeanGunnThanos" /> Before Cooper was cast, James Gunn said that it was a challenge finding a voice for Rocket, that he was looking for someone that could balance "the fast-talking speech patterns that Rocket has, but also can be funny, because he is really funny. But also has the heart that Rocket has. Because there are actually some pretty dramatic scenes with Rocket."<ref name="IGNRocketJun2014" /><eod>