Shadow Whiscash

Shadow Whiscash is definitely better than its base forme, but it's still discount Swampert.

Best PvE Offensive Moveset

• Mud Shot should be paired with Mud Bomb; this set is best against Rock-types.

• Water Gun should be paired with Water Pulse for dealing Pokemon weak to Water.

• Scald is inferior

• Blizzard could be used against Dragon-types, but why would you use Whiscash in such a way?

Best PvE Defensive Moveset

• Mud Shot is marginally superior to Water Gun, offering slightly better coverage.

• Mud Bomb is generally superior to Water Pulse, hitting both earlier and more often.

• Blizzard hits fast and can surprise Grass and Dragon-type counters.
• Scald is harder to dodge than Water Pulse, but it comes out less frequently making it generally inferior.

Mud Shot has a high EPT, allowing Whiscash to unleash a flurry of charge moves.

Mud Bomb is able to be spammed because of its low energy cost, allowing it do force shields easily and do great damage if they decide to forgo shields. Scald is a great secondary Charged Attack that also benefits from STAB; its high chance to debuff Attack synergizes well with Whiscash's good bulk. Blizzard is too expensive to be used consistently, but it can surprise Flying-, Grass-, and Dragon-type Pokemon if it goes unshielded.