Rhino is thick, but strong. He will bash the ground and rocks will fall down.

Dodge them and when he charges at you make sure you're at one of the electrical poles, then jump over him to make his horn get stuck.

He will be mildly electrocuted.

Throw a rock at him if you can.

Caution: This battle is only on half a platform. When I did this boss I always fell off the edge. STAY AWAY.

In round 2 after he says he's gonna bop ya, he sends out shockwaves.

Jump over them and dodge his attacks till he charges into a pole again.

Repeat it and congrats, you have a splintered head sidekick.