Henri chuckled. "Well, I mean, it lowering the speed was a nice side-effect,I mainly wanted to see your Pokémons reaction. Not too long ago I had a Pokémon flee the arena after that move." As he talked he kept an eye on the Ninjask doing its Aerial Ace which all his Rhydon could do against was brace himself.  
"Smackdown," he ordered.
After being hit with the Aerial Ace, followed by the Metal Claw, the Rhydon panted but rose his arm. An orange orb formed in the paw and he moved to smack the Ninjask into the sand with as much force as he could gather.