055 Golduck

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. 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. 

Golduck is a mono-Water type Pokemon with average bulk and an interestingly large move pool. The update following the September 2019 rebalance gave Golduck three extra charge move options which is great for Golduck, but bad for our limited Charge TMs. Numerous moveset combinations make Golduck quite versatile and lets it be customized more specifically to a player's needs depending on what coverage they need for their team. However, as a Water type Golduck has a lot of competition in this league, which makes it less desirable due to its unimpressive bulk and unspectacular damage output or energy generation. 

Golduck has a max CP of 2450, which is just under the cap of Ultra League. This makes it relatively expensive, as Golduck must be maxed out to perform best in this league. Perhaps this high cost is a good thing, as Golduck's lack of powerful moves causes it to lose many matchups against meta picks, and that should be enough to discourage investments in Golduck. 

Ducks don't have much of a chance against dragons and dinosaurs.