How do you get to Biollante in Godzilla unleashed thank you

do story mode as an earth defender (godzilla,mothra,etc) and do rumble in the surf at tokyo. destory the building with vines on it. if you notise that biollante's head pop out of the water, that is a good thing. you must fight him later in the game at the level called biollante (she is very easy to defeat). if defaeted, she then will be for purchase at the store for $30,000.