well attack u probably want to take with you:
6 lg barrel bombs
10 sl bombs
bounce bombs
3 shock traps

with sword attacks always aim for the stomach because it is the vulnerable part of its
rock body when its stomach goes pink it means it is weak. use all your small and bounce
bombs on it but spare 3 small bombs and then use ur shock traps. For each shock trap use 2
lg barrel bombs and 1 small bomb. if ur successful with this u will be able to kill it.
good hunting

But its not as easy as it looks. Try and see it for yourself.

if you hav the damage boost from the cats chiefs and the boost from the sword it really
beats the gravios, it pieces the gravios wiv greater ease