- Hilarious in Hindsight:
- A fighter appearing in Chishio no Me is based on Geese Howard. While he does square off in various crossovers featuring him and Street Fighter characters, he does face off against the Tekken cast in Tekken 7.
- The appearance of Kunimitsu in Majin Seryu Ki is made a little hilarious after the reveal of Tekken 7's iteration. To wit, she didn't die, and she even gets a daughter in her place. Needless to say, the author did not see it coming.
YMMV / The Ketsueki Quadrilogy