>>34530728Bisharp and Pawniard are harder. Bisharp only calls Pawniard, and Pawniard can''t SOS call. So you are pretty much forced to get a Shiny Pawniard by SOS chaining within 75 turns, until Bisharp dies. (And Bisharp isn't guaranteed to SOS call each turn.)
You need a Ghost-type Pokemon to stop Final Gambit. As far as I'm aware, there's no way to extend Bisharp's SOS calling.
There are also Pokemon such as Remoraid that hardly ever SOS call, so good luck trying to chain them.