Harry Potter and the Chamber of Secrets Walkthrough
The Chamber of Secrets

This is really your last challenge. You meet up with Ron. Ginny is missing, Hermoine is petrified. The monster is a basilisk, it lives in the pipes. Head to the 2nd floor bathroom.

Talk to Myrtle. she saw eyes by the sink. Harry says 'open up' in parseltongue and the sinks open. He jumps in. Head to the center of the room - see Ginny. Tom is there. He says he's Lord Voldemort. The basilisk comes out, and Fawkes the phoenix drops a sword for you and attacks the basilisk.

OK this is literally your last fight in the game. Grab the sword, and target the snake. Attack when he rears up. Use the left stick to point the beam at his throat during that attack period. He'll react loudly when you get it on target. Each time you nail him, he'll fling the sword somewhere and you have to run and get it while rocks fall on your head.

When you get him four times (hardly a real boss battle!!) the snake dies, Tom dies and Ginny is OK. She apologizes pretty feebly and Harry of course says "Ah, that's OK". They leave and that's it.

Harry Potter and the Chamber of Secrets Walkthrough, Tips and Techniques