Swim in the air is a well-known glitch in the original Spyro games. In all of the console games except Spyro the Dragon (where Spyro cannot swim), it is possible to let Spyro swim freely through the whole level, in some cases reaching a Collision Free (non-solid wall) version of the level, after swimming straight up for a long period of time, sometimes around 10 minutes. How to perform this feat varies with games and levels, but here are the most common ways to get the glitch working.