Spyro 2 - The Gateway to Glimmer 

Hint:
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On the level on which you have to save the creche of 
turtles, go to the chef. Charge into the water without 
the chef game starting. When in the water, swim to the 
surface and edge. The game will 'pull' you back to the 
chef (as if you had lost the chef game). You should now 
be 'swimming' in the air!! You can fly-swim anywhere on 
the level, but if you touch thewater, you will lose the 
swim-fly cheat. This effect ends when you leave the level.