If you want to get the two Gold Bolt's on planet Gaspar, follow these steps:

After you have beaten the level, go back to the end of the level (You can just take a shortcut from the first part of the level: go left.) When you are there, look down in the lava. You should see a cave that is in the lava and looks like a monster's mouth. Glide in the cave. Go to your Weapons Menu and select the Walloper. Try not to destroy everyone there, but as you go along, you can hit a few people if they get in your way.

At the end, you should see an elavator that leads to the Gold Bolt! There is also a lota' ammo up there!