>>30622724Day: Strong Jaw, Ice Fang, Earthquake and U-Turn are all good options. Making it Normal/Rock and giving it Extremespeed is optional, but riskier.
Night: Dynamicpunch, Cross Chop and Iron Tail would certainly help. Optionally, give it Moxie and Pain Split, cut the speed further and give it more defense if you want to play into the bruiser-style that the pokedex suggests.