You can get a Flygon by catching a Trapinch in the desert region. At Level 35, it will evolve into Vibrava, which will then evolve into Flygon at Level 45. Flamethrower: This will give you the ...
It's unfortunate because Flygon could've been useful even early on in Ash's journeys. Catching a Trapinch and evolving it into Vibrava and then Flygon would have been a nice thing to see as well ...