In 2006, Sony released Bloody Roar on the PlayStation Network (PS1 Classics) in Japan and Europe. For that version, the developers actually finished the job.
In summary, for the 1997 original, Uriko remains a "phantom" character—visible and formidable, yet legally untouchable without the help of external cheating software. Bloody Roar 1 Unlock Uriko
Here is the roadmap to triggering the secret encounter. In 2006, Sony released Bloody Roar on the
If you manage to access her, here are her signature moves: for the 1997 original
How to Unlock Uriko in Bloody Roar (1997)