Nature: -SpAtk +Spe (jolly)
EVs: 252 Atk, 252 Spe, 4 SpDef
Ability: Strong Jaw (biting moves 1.5x)
Item: Choice Scarf (speed 1.5x but can only select one move)
- Fishious Rend (STAB, biting, power doubles if moves before target)
- Psychic Fangs (PSY, biting, can destroy Light Screen & Reflect)
- Crunch (DAR, biting, 20% chance to lower targets defense)
- Ice Fang (ICE, biting, 10% chance to freeze target)
Summary: For this Pokemon I completely agree with the Smogon set (which isn't always the case for me). The vast majority of the time you'll be wanting to use Fishous Rend which can deal enormous damage as well as Water moves being able to hit everything and only being not very effective against three types. Will have to watch out for abilities like Water Absorb, Dragon types and Pokemon that can out-speed Dracovish.
It does have access to a variety of other moves that also take advantage of its Strong Jaw ability and might come in handy on occasion. Choice Scarf works beautifully as Fishous Rend relies on out speeding the target. Speed investment is crucial as its base speed isn't terrible but isn't good either.