Slurpuff

Slurpuff is a cute addition to Pokemon Go, but not too sweet for the meta due to its low stats. Its moveset makes it more appealing to use for PvP, and at the very least it has access to a Fairy-type fast move. 

Best PvE Offensive Moveset

• Charm and Fairy Wind are extremely close. The former has a tiny DPS advantage, while the latter has superior flexibility.

• Tackle is bad. 
• Play Rough outperforms Draining Kiss on offense.
• Flamethrower and Energy Ball don't have much use for a Fairy Pokemon on offense.

Best PvE Defensive Moveset

• Charm is a great move for defense thanks to its high base power.
• Fairy Wind has pathetic damage output on defense. 
• Tackle is still bad.
• Flamethrower is the best charge move for defense due to its coverage against Slurpuff's weakness to Steel-types.
• Play Rough hits harder than Draining Kiss on defense, with similar dodge timings.
• Energy Ball is too slow for defense. 

Charm takes advantage of STAB to deal significant damage, though its energy generation is the lowest in the game. Fairy Wind offers an option to sacrifice damage output in favor of energy generation, but Slurpuff's Charge Moves are all moderately costly to use. Tackle is a poor move. 

Flamethrower is a useful coverage move that's valuable against common Steel-types in the meta, though its moderate energy cost makes it difficult to access. Energy Ball isn't particularly valuable against Slurpuff's weaknesses, but Grass-type coverage is welcome in a meta that consists of common Water-types. Play Rough is considerably stronger than Draining Kiss at the cost of 5 more energy, and hits hard with STAB but doesn't provide any additional coverage.