Golduck

Water Types are commonly seen in Pokemon GO, and Golduck is outclassed by a lot of other Pokemon who are either more powerful, durable, or both. Sadly, it's probably best to just leave this duck in the pond.

Best PvE Offensive Moveset

• Water Gun is superior to Confusion for filling Golduck’s role as a Water-type attacker, though the latter can be paired with Psychic for a very mediocre Psychic Type moveset.

• Hydro Pump is Golduck's strongest Charged Move, but Liquidation is just a touch weaker but far more reasonable thanks to being 2-bars.

• Cross Chop, Synchronoise, Bubble Beam and Ice Beam lose out on STAB and perform suboptimally against Golduck’s best matchups.

Best PvE Defensive Moveset

• Confusion is Golduck’s best move on defense, outperforming Water Gun by a huge margin.

• Ice Beam is superior on defense due to having 2 bars and Grass-type coverage.

• Liquidation is the best charged move for neutral damage, but it gives counters an easier time.

• Psychic is a worthwhile move on defense thanks to having 2 bars, good power, and relevant coverage against Fighting types. It easily beats out Synchronoise.

• Bubble Beam is weak, but it has 3 bars, which grants it some utility on defense.

• Hydro Pump is powerful, but too slow to be useful on defense.

• Cross Chop is too weak to be worthwhile.

Water Gun features average damage output and energy generation, but STAB helps to increase its damage. Confusion can be chosen for its interesting coverage, but its long animation time can make it difficult to use. 

Cross Chop is recommended for its wide coverage, in addition to its cheap 35 energy cost. Liquidation is a great STAB move, but many other Pokemon have strong Water-type movesets, so Golduck may want to choose its other coverage options to be more unique. Bubble Beam has a debuff utility and can be chosen instead as a shield bait option, but is underwhelming if the bait fails. Ice Beam provides useful coverage, especially against Dragon and Grass-type counter picks. Psychic or Synchronoise could also work depending on what coverage is needed, though they aren't generally recommended.