New Super Mario Bros. Tips

Final Bosses: Shaking Skull.
When Ur at the final bosses (Bowser and Bowser Jr.) before u get close to them stay where u are so you'll see Skeleton Bowser (lying) and Bowser Jr. . Wait a few seconds on the spot and u should see Bowser's skull shaking!
I'll also put a video of this soon on YouTube.
My name is SinHorn on YouTube!