Sho only pretended to be vulnerable to the attack so he can launch a surprise attack on all surrounding Zoanoids so he and Biofreezer can focus on evil Aptom. Guyver 2's control medal was damaged after the test Zoanoid Malmot was captured and detonated the explosive that sent the units in different directions. Guyver 2's was damaged after the explosion slammed the unit against a boulder and cracked the control medal.it composes of we can tell you, but not really sure how strong it is. Just know it is strong enough to bust a decent sized hole on almost anything. The only Zoanoid that withstood this attack was Zx-Tole
No, he was vulnerable to it, what he said was that he pretended to get knocked out before he could get knocked out for real, aka he thought that if those sonic things lasted any longer it would've caused him to lose consciousness, so he pretended to be unconscious on purpose so he could take out those flying guys by surprise and not have to deal with that anymore.