the kokiri theme that is installed came from kirby's backups, it is the one and only original smf kokiri theme. It was never finished and unless kirby feels ambitious it probably will never be
The zora theme is not 100% either, but it is very close.
The Dark Blue theme is the only completed one of the bunch.
If you want the zfgc-x theme on the forums then it needs to be turned into an SMF skin, it is not compatible as is from Invisionfree.