Use your thermal visor and wait until one of his limbs turns a different colour and then shoot it with the wave beam, then he should roll up and try and trample you. To dodge this turn into the morph ball and roll out of its way. Then repeat the process for each of his limbs.
Each limb will need to be destroyed one at a time. Then you will need to do this process for his head.
Hope this helps

Me I jump over him and shoot his weak spot with powerbeam. Also lay bombs to hit his weak spot while it is rolling.