Yoda present in work Star Wars: Episode III – Revenge of the Sith
Concept and creation
Franchise creator George Lucas originally planned to have Obi-Wan Kenobi continue training Luke Skywalker in The Empire Strikes Back (1980), but decided that it would not make sense to have him standing around watching Luke do all the fighting in the films and not help him (in addition to health problems of his portrayer, Alec Guinness), so he killed him off in the first film. He then created a new character, Yoda, to have someone train Luke, who was explained to have mentored Obi-Wan and was based on early, more alien ideas for that character.With muppets (especially Kermit the Frog) in mind as a basis for Yodar, Lucas approached Jim Henson to perform him; Henson, being busy with other projects, instead recommended Frank Oz for the part.
According to the make-up artist Stuart Freeborn, Yoda's face is based on his own and Albert Einstein's (particularly the eye wrinkles of the latter). In early concepts of Yoda, as well as the novelization of The Empire Strikes Back, he had a blue-skinned face instead of a green one.  For The Phantom Menace, he was redesigned to look younger. He was created using computer-generated imagery (CGI) for two distant shots in the 1999 release but remained mostly a puppet, with Stuart Freeborn's original design reinterpreted by Nick Dudman.
Frank Oz provided Yoda's voice in each film and performed as lead puppeteer in Star Wars: Episode V – The Empire Strikes Back (1980), Episode VI – Return of the Jedi (1983), Episode I – The Phantom Menace (1999) and Episode VIII – The Last Jedi (2017). He also performed a vocal cameo as Yoda in Episode IX – The Rise of Skywalker (2019). For some walking scenes in The Empire Strikes Back and The Phantom Menace, dwarf actors Deep Roy and Warwick Davis appeared in costume as Yoda (though neither was credited). While Oz served as the primary performer, over the years he had been assisted by a multitude of other puppeteers, including: Kathryn Mullen (Ep. V), Wendy Froud (Ep. V), David Barclay (Ep. V–VI), Mike Quinn (Ep. VI), David Greenaway (Ep. I & VI), Don Austen (Ep. I), Kathy Smee (Ep. I), Dave Chapman (Ep. VIII), Damian Farrell (Ep. VIII), and Colin Purves (Ep. VIII). For the radio dramatizations of The Empire Strikes Back and Return of the Jedi, Yoda was voiced by John Lithgow while Tom Kane voiced him in the Clone Wars animated series and several video games.
Rendered with computer animation in Episode II – Attack of the Clones and Episode III – Revenge of the Sith, Yoda appeared in ways not previously possible, including his participation in elaborate fight scenes. In Revenge of the Sith, his face appears in several big close-ups, demanding highly detailed CGI work. His digital incarnation, overseen by Rob Coleman, was deliberately designed to be consistent with the limitations of the puppet version, including the occasional ear-jiggling.Yoda was recreated in CGI for the 2011 Blu-ray release of The Phantom Menace. A clip of the new CG Yoda from The Phantom Menace was first seen in the featurette The Chosen One, included in the 2005 DVD release of Revenge of the Sith. The 2012 theatrical 3D release of The Phantom Menace matches the 2011 cut featuring the CG version of Yoda.Episode III: Revenge of the Sith (2005)
In Revenge of the Sith, Yoda leads the Jedi Council in pursuing the mysterious Sith Lord Darth Sidious. Palpatine has by then amassed near-dictatorial emergency powers and begins interfering in Jedi affairs by appointing Anakin as his personal representative on the council. The Council grants Anakin a Council seat but denies him the rank of Master, feeling that doing so would amount to giving Palpatine a vote in the council. Additionally they order him to spy on Palpatine, whom Anakin considers a friend and mentor.
Anakin seeks Yoda's counsel about his prophetic visions that someone close to him will die. Yoda, unaware that the person of whom Anakin speaks is Padmé, or that she is Anakin's wife and pregnant with his child, tells him to "train yourself to let go of everything that you fear to lose." Unsatisfied, Anakin turns to Palpatine, who then reveals himself as Darth Sidious. Sidious manipulates the young Jedi into becoming his Sith apprentice, Darth Vader, with the promise that the dark side of the Force holds the power to save Padmé from dying in childbirth.
Sidious later transforms the Republic into the tyrannical Galactic Empire, proclaiming himself emperor for life and ordering the clone troopers to kill their Jedi generals. Yoda is on Kashyyyk, overseeing the battle between the Separatist forces and a combined command of clone troopers and Wookiees. Through the Force, Yoda feels the deaths of each of the Jedi as they are assassinated by their own troops. After swiftly killing the clone troopers instructed to kill him, he escapes with Wookiee leaders Tarfful and Chewbacca to Coruscant, where he and Obi-Wan fight their way into the Jedi Temple to stop a trap for all surviving Jedi. Inside, they discover that all the Jedi inside, younglings included, have been slaughtered. They then discover a holographic recording revealing Vader as the assassin. Yoda decides to face Sidious, sending Obi-Wan to kill Vader. When Obi-Wan protests, Yoda tells him that the Anakin he knew no longer exists, having been "consumed by Darth Vader."
Subsequently, Yoda battles Sidious in a lightsaber duel that damages the Senate Rotunda. In the end, neither is able to overcome the other and Yoda is forced to retreat. He goes into exile on Dagobah so that he may hide from the Empire and wait for another opportunity to destroy the Sith. At the end of the film, it is revealed that Yoda has been in contact with Qui-Gon's spirit, learning the secret of immortality from him and passing it on to Obi-Wan.
Yoda is also instrumental in deciding the fate of the Skywalker children after Padmé dies in childbirth, recommending that Luke and Leia be hidden from Vader and Sidious; he sends Leia to be adopted by Senator Bail Organa of Alderaan, and Luke to Vader's stepfamily Owen and Beru Lars on Tatooine. Other than the ancient Jedi Master, only the Organas, the Lars family, R2-D2 and Obi-Wan know of their true identities.
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