Galarian Slowking

Galarian Slowking has poor stats for raids and attacking gyms, but makes for a decent gym defender due to its resistances against common Fighting-type attackers. Unfortunately it isn't extremely threatening against other attackers like Tyranitar. 

Best PvE Offensive Moveset

• Confusion paired with Future Sight is good for a Psychic-type role.
• Acid and Sludge Wave aren't amazing, but benefits from STAB and makes for a budget Poison-type role. 
• Hex synergizes with Shadow Ball for a Ghost-type role, but actual Ghost-type Pokemon should be considered. 
• Surf* and Scald are the worst options on offer.

Best PvE Defensive Moveset

• Confusion is the best fast move for defense due to its incredible base damage.
• Hex is less likely to be resisted than Acid on defense, but the latter is better vs neutral attackers. 
• Scald has great neutral coverage and comes out frequently than the other options.
• Surf* is basically Scald but worse on defense.
• Shadow Ball is a 2-bar move with great power and coverage, though it's also easy to dodge.
• Future Sight is faster and stronger than Sludge Wave for defense, but neither might see use before Galarian Slowking faints. 

Confusion sports more than double the damage output of Hex thanks to STAB, but the latter offers faster energy gains. Acid is a poor move, even with STAB. 

Surf is mandatory due to being Galarian Slowking's only low cost Charged Attack, and is a great move in general. Shadow Ball costs a moderately high amount of energy, but it has a largely unresisted coverage. Future Sight and Sludge Wave demand the same high energy cost and threaten a lot of STAB damage if unshielded; either can be viable depending on the preferred typing coverage.