• R/B
• G/S
• R/S
• D/P
• Strategy
• Moves

Golduck

The moveset is pretty simple, just Amnesia once or twice and sweep. Golduck should always have Amnesia; that's the only reason to ever use it. Golduck can also make use of Body Slam for its paralysis chance with its decent Attack, which might help set up Golduck. Rest helps him to last a little longer, and would work better in the underused metagame, where he should be used; just make sure common counters like fast Electrics have been already taken care of if you decide to Amnesia early, otherwise you'll be forced to switch, fearing a critical hit. It can still be decent in standard, though. Amnesia takes away its weaknesses, but it still needs to watch out for critical hits and mostly Razor Leaf while it's either paralyzed or has been put to sleep. He's faster than both Venusaur and Victreebel, which is a good thing, and can OHKO them after an Amnesia with Blizzard.

Other Options

Counter can work against things such as Snorlax. Substitute is nice, especially once you've powered up, since a special attacker might not be able to break it. Disable is interesting but inaccurate. Submission is unreliable but can hurt Chansey. Golduck can also learn Mimic, which could be pretty awesome if it somehow Mimics a Thunderbolt. Hydro Pump is useful for higher damage if you don't mind the miss rate.

Opinion

Golduck has all-around pretty solid stats, making it a good Water-type. It's pretty decent in UU, and if played right, he can harm some standard teams. It may not have the best stats in the game, but it does have decent move selection.

Counters

Lapras and Starmie are its main counters in standard. Zapdos can also counter it (2 Amnesias then Blizzard would OHKO it, though). Critical hits would KO Golduck while it sleeps. Poliwrath is Golduck's main counter in UU, being able to Amnesia and hit it hard with STAB Submissions. Other UU Electric-types also counter it well, as even if they don't land a critical hit, they can usually weaken Golduck enough for another fast Pokémon to finish it. Faster Grass-types will also be a thorn in Golduck's side, namely Venusaur with its high critical hit rate Razor Leafs.