Ken joins the battle as Ryu’s Echo Fighter! Their differences are carried over from the original game: Ken’s Hadoken is shaped differently, his strong Shoryuken has flames, and he moves a bit faster. He has two final smashes: Shinryuken and Shippu Jinraikyaku.
Up Taunt: Ken did this when he was interviewed in his reveal trailer. He faces the screen, and announces "Yeah!" while giving a thumbs-up. This is based off of his Street Fighter Alpha winpose.
Down Taunt: Ken moves his finger towards himself, beckoning towards himself while saying "Bring it on!". Resembles his Street Fighter IV intro along with his quote.
Side Taunt: Ken catches his fist in his hand and points forward, saying "Get serious!" Based off of his unique intro with Ryu in certain games, matching the latter's own side taunt. The quote itself comes from Ken's fifth Personal Action in Street Fighter IV.
Ken brushes his hair before giving a thumbs-up to the camera, saying, "I did it!" This was his recurring win quote in the series, debuting in Street Fighter III: Third Strike.
Ken punches twice, before doing a roundhouse kick similar to his forward Smash, saying, "Challenge me after some practice." The Japanese version has him say, "Come at me as much as you like!" This is based off his winning quote from Street Fighter II.
Ken kicks twice (the first being the Nata Otoshi Geri kick and the second being the Oosoto Mawashi Geri kick) and performs a beckoning gesture, saying, "I knew I would win! Hah!" In Japanese, his quote is changed to, "It feels good to win a spat!" This is baed off one of his generic win quotes from Street Fighter V and is based off his victory pose throughout the series, specifically his Street Fighter V variant.