The description mentions a "weird 'sunken cities' variant", but encountering the Distant Palace in the Massive Oil Slick with this and virtual pet bass running on a TZR chipdeck and a heavy fishing pole equipped does not give an option to fish or any special text. After this encounter I'm also not getting an option to download or buy the sunken cities game/soundtrack from the Extreme Fishing website (even with an OJ charge).
Extreme Bass XIII Player / Discussion
This is the discussion related to the wiki page Extreme Bass XIII Player.