Segata Sanshiro is an advertisement character for the Sega Saturn in Japan. He usually goes around and beat up people until they play a Sega Saturn. He ended up dying saving Sega from a Missile but his death has since been retconned and he lives once more. He also has his own game for the Saturn, which ended up being the very last game for the system. He also has a kickass theme.
When Mike learned of Segata Sanshiro he was impressed at his feats but was disappointed he didn't do a lot of things he wanted him to.