the pot centipede? u have to not let it put its self together so taget one at a time n attack until u smash it all to peices. wen da head n tail are left try ur best to attack the tail n be careful of da head. u need to use aero to take the hits. try ur best to also stay away from da head or else ur gonna get hit alot. it if assembles its self again try to hit da pots in da middle n use thunder or sonic blade to make it broken again. repeat this process
the one at the end?
ok use aeroga n lock on to dat dudes head n attack like hell, n wen he uses dat fire breathe thingy get behind him n hit his head. u cant avoid his eruption attack wen ur close so b careful. wen he uses energy balls use aeroga so it can reflect it. after dat u get super glide
after u find kerchack he should toss u into the waterfall n u can lock the door. alice is at the castle n u find her later in da game