Unlimited lives:
Play through the sports equipment level. Collect the following objects after the second spike: lips, ice-cream, violin, globe, and snowman.

Power combo:

Collect the following objects in order on the far right of the hub: penguin, oil, wine, globe and racquet.

Invincibility:
Move to the top of the wall of the castle (above the Arctic Toys sign) and collect the following objects in order: cupcake, hammer, globe, apple and faucet. James Pond is invincible for the next fifteen minutes. Note: Falling off the screen will still harm your character.