Activate the Chalice of Power
At the Treehouse enter: UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT
At the Treehouse, find the "Robot Finds Kitten" message. Run to the nearest desk with a picture frame, stand next to it, wait three seconds and press: CIRCLE, CIRCLE, TRIANGLE, CIRCLE, X.
If you have a Ratchet and Clank Size Matters save on your mem-stick, go to Special, and choose the "Check for Size Matters" options.
At the Specials screen enter: LEFT, LEFT, RIGHT, UP, DOWN, DOWN, X.