~Tested to work by ME!!!~ Guaranteed
This is a very useful and neat glitch to get gems, get lives, get more Fodder for Sparx, and reach higher places easier in the Seashell level. I included steps so you won't get confused
1. Enter the Seashell level (the one by the deep water in the dragon realm)
2. Go to the section of the level where there is only ONE (I reapeat ONE) arch in the water, and ONE waterfall with purple flowers in the middle of the waterfall.
3. Go to the right side of the flowers in the waterfall (the bigger part) and go as far back in the waterfall as you can and don't go underwater.
4. After that, jump once and do a head-smash into the water, and go down on the grey control stick as soon as you do the smash. Spyro will look like he's flying now, except he'll use the same controls and looks as if he's underwater. You can't breathe fire, but you can still charge and fly unlimitedly! To get back to normal, just go in the water. Thanks!!