>>45949640Honestly having one weakness isn’t as much of a problem for Spiritiomb as its low speed, lack of utility, and weaker offenses are.
Being realistic and assuming they only give it a G-Max form and maybe some new moves, I think the following would be good:
Teleport (for pivoting in singles)
Strength Sap (recovery option)
Trick Room (doubles utility)
G-Max Condemnation [Dark]
Disables the last moves used by opponents.