Instructions
Navigate to the end of the level.
Dodge Gobblegut by running around the planet. If he gets too close, he'll attack with his head.
Listen for the sound of a train whistle. The sound indicates that Gobblegut is about to dive into the planet. This is when he is weak.
Spin attack Gobblegut's weak points, which look like red rings encircling his long body. Shake the Wii-mote to execute a spin attack. Gobblegut has six weak points. Try to hit as many of them as possible on his first dive. After you hit the first three, he will get angry and will begin to move faster.
Hit Gobblegut's last three weak points. Because he will now be moving faster, they will be trickier to hit without taking damage. However, because he moves faster, he can now keep up with Mario. This makes it easier to turn quickly and hit the hard-to-reach weak points near his head as soon as you hear the whistle.