Lunatone

Lunatone is a somewhat iconic Pokemon, and a bit rare due to the fact that it and Solrock change places in the Northern/Southern hemispheres for each equinox. However, it's genuinely not worth investing in.

Best PvE Offensive Moveset

• Rock Throw should be paired with Rock Slide, the bread and butter Rock-type set.
• Psywave can be paired with Psychic, though Lunatone is poor as a Psychic attacker.
• Confusion is a great Psychic Type Fast Move, but is inferior to Psywave.
• Moonblast has minimal offensive utility on Lunatone.

Best PvE Defensive Moveset

• Confusion is great on defense.
• Rock Throw isn’t too shabby, but it’s inferior even when Confusion is resisted.
• Rock Slide is the optimal defensive charge move, with high power and 2 bars.
• Psychic is good on defense, but it's redundant with Confusion.
• Psywave pales in comparison to Confusion on defense.
• Moonblast is 1-bar and will probably never get a chance to be used.

Confusion is generally recommended due to its superior energy gains, but Rock Throw can provide direct and immediate Rock-type coverage if needed as a specialist. 

Rock Slide costs the least amount of energy, gets STAB, and provides wide coverage. Psychic benefits from STAB to threaten strong Psychic-type damage, while Moonblast is an alternative option that offers Fairy-type coverage to hurt Dark-type opponents.