Most prolific cross-over fighting videogame

The most gaming cross-overs between fighting games series is 13, achieved by Street Fighter (Capcom, 1987), which has seen its characters facing against the likes of the X-Men, Marvel Comics, Japanese TV company Tatsunoko, rival fighting game producer SNK and Tekken (Namco, 1995). Featured in Guinness World Records Gamers Edition 2011