Your sheet for Sammy is missing the frames for his special attack. You either have to have a 6-button controller enabled and do a certain button combination, or survive long enough to get three stars on your hud to execute it.
EDIT
Actually, looking closer, the special move just re-uses other frames, but it does look like you're missing his throw. You need to press C while holding an enemy and press B before you reach the other side.
EDIT
Actually, looking closer, the special move just re-uses other frames, but it does look like you're missing his throw. You need to press C while holding an enemy and press B before you reach the other side.