Moves.
Shadow Boom- Hold Back, then press Forward+Any Punch Button.
Shadow Shell- Hold Down, then press Up+Any Kick Button.
Shadow Slash- Up,Up/Forward,Forward+Any Kick Button (in mid air).

Super Combos.
Shadow Break- QCF+Two Punch Buttons together.
Shadow Justice- QCB+Two Kick Buttons together.
Cross Shadow Blitz- WCF+TWo Kick Buttons together.
Final Mission- Hold Back, then press Forward, Back, Forward+All 3 Punches.