On the PlayStation disc, there's an unused face sprite of Kazuya. He was planned to be a save icon, but was replace with Heihachi in the final game.

In Paul Phoenix's ending, there's a poster of Kazuya Mishima's face that resembles the unused sprites for the save memory icon.

In an interview with Polygon, the series lead Director, Katsuhiro Harada, confirmed that King's motion capture was performed by Japanese pro-wrestling star and MMA pioneer, Minoru Suzuki. The wrestling star made King's fighting style with a mix of Mexican lucha libre and Japanese puroresu. Harada also said that Suzuki also invented original moves for King and Michelle (as well as Julia in future games). Harada also says that Suzuki also offered to choke him out, to which he said "Yeah, of course dude, I want you to choke me out" and that "it felt like taking a refreshing nap."

King's backstory was inspired by Sergio Gutiérrez Benítez, a catholic priest who moonlit as the masked wrestler Fray Tormenta to raise funds for his orphanage, while the character's jaguar mask design was inspired by Tiger Mask, a recurring masked persona first portrayed in real-life by mixed martial artist Satoru Sayama, and a character licensed out to Japanese professional wrestling companies from the 1968 manga of the same name by Ikki Kajiwara.