Sasuke took little to no actual damage from the headbutt due to the effect of protean turning him into a ghost-type. Even the stun from the hit was a facade he put up to leave the enemy off guard. Seeing what the magnemite was plotting, since he has one himself, he used his quick thinking. "Xemnas protect Sasuke, grab hold of that magnemite with your jaws then use it as a shield!" Slade also did a small hand signal to Sasuke telling him to use grass knot on the Elgyem. He preform the signal very silently, he just crossed his fingers in his right hand and looked at the Elgyem. One could notice if one was paying attention to Slades hand which was by his side at that moment. The small dragon leaped at the floating Steel-type pokemon attempting to grab it with a bit attack then use it as a meat shield, well more like a metal shield, to protect Sasuke. Which, assuming all goes according to plan, the Elgyem would have to go through his teammate's magnemite and Xemnas in order to get to Sasuke, who was pretending regaining his bearings after being stunned by the attack and secretly controlling a grass knot under Elgyem. Though the attack would come slower then usual since he wasn't fully focusing on the attack, so the psychic-type would have to act fast in order to not be affected by it..