try upping it from 15, little by little, until u have something that works for u
fyi the watchdog config patch was made by a user and not committed in the actuall source code, it was compiled into the build by other users. it was made for ssbb, and may work with other games but mostly it just makes the fps counter go up. u can read about it here. the default value for watchdog is 60, so if it causes problems with other games just set it to 60 and go back to your normal settings, other audio off, framelimiter, etc.
fyi the watchdog config patch was made by a user and not committed in the actuall source code, it was compiled into the build by other users. it was made for ssbb, and may work with other games but mostly it just makes the fps counter go up. u can read about it here. the default value for watchdog is 60, so if it causes problems with other games just set it to 60 and go back to your normal settings, other audio off, framelimiter, etc.