Ken Masters

Ken Masters is one of the central characters of Capcom's Street Fighter series. He is the best friend and rival to Ryu, and uses improved Shoryuken ki techniques to fight. He has made crossover appearances in the Super Smash Bros. series.

Super Mario Klemp-Won-Do: Muskeln sind nicht alles!
The German Club Nintendo magazine published a 1992 comic titled Super Mario Klemp-Won-Do: Muskeln sind nicht alles!, which features various characters from the Street Fighter series. Among the characters Mario meets in the comic are, Dhalsim, Chun-Li, Blanka, and Ken.

Super Smash Bros. for Nintendo 3DS / Wii U
Ken makes his first appearance in the Super Smash Bros. series as a trophy in Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U, obtained upon downloading Ryu.

Super Smash Bros. Ultimate
Ken appears in Super Smash Bros. Ultimate, as an unlockable character and an Echo Fighter to Ryu. He shares many similarities to Ryu, though he focuses more on the use of his legs and moves faster because of it. His Shoryuken and Tatsumaki Senpukyaku can deal repeated damage unlike Ryu, and his Hadoken has a graphic of his hands displayed within. He shares his debut trailer with Incineroar.