Sehto was Sehto's initial run, around 2004.
While meticulously prepared in regards to pokébattles, it was otherwise a bit of a hack, largely attributed to that the gamemaster (pinkgothic) spent far too much time making it work in the regular pokéverse with its rules rather than focussing on the plot and the potential freedom from the budding freeform elements.
As such, it's best forgotten, even if it did introduce the two plotline-immortal characters Jagdish Tsukinaka (de-facto nameless at the time) and Dakarai N'Sehla (known only by his post-Taqnateh nickname Rhaptor) in the rough, as well as set up the island's geography in brief.