A new picture of my Flygon, Kali, standing in horizontal biped stance. I imagine Flygons being capable of hopping like kangaroos either before flight (in order to reach a proper speed and height) or simply to rest their wings. This stance is much more aerodynamic than upright bipedal stance, so it is probably more likely to be used when trying to move fast near the ground. Wings can be used as air brakes for quick, agile maneuvers, to take pressure off the ankles.

I also have a size reference along the left and top, showing Kali's current height and length in feet