[Elly]

SEAKING *u*k YEAH!!!

Seaking @ Choice Band / Choice Scarf / Life Orb
Ability: Water Veil
Nature: Admant
EVs: 6 HP / 252 Atk / 252 Spd
- Aqua Tail / Waterfall
- Megahorn
- Return
- Poison Jab

Seaking *u*k yeah!! Standard Choice set, but with the bonus of Burn immunity. Just pick the attack and pound away. Life Orb gives you some freedom, but will kill the ruler of the ocean very quickly.

Seaking @ Focus Sash
Ability: Water Veil
Nature: Adamant
EVs: 132 HP / 252 Atk / 124 Spd
- Waterfall
- Return / Flail
- Agility
- Hidden Power [Fire] 30

This only works with a slow Swords Dance Baton Passer. Pass a Dance or two, then Agility as your Focus Sash saves you. Sweep with your massive speed and attack. Rain Dance and Swift Swim work, but then there's a five turn limit to your sweep and you are open to Burn.

Since Focus Sash has the potential to be used, Flail may be a better option than Return.
However, Return has it's merits if they opt NOT to attack you (in favor for a Support Move).