>>31813199I would've probably gone this route in designing a Mega Flygon, just so that it would get its previous evolution's great ability again.
Perhaps in a mega design, the red edges of it wings grow spikes, something similar to what Druddigon has for wings. That way every time it flapped its wings, it would look like a Trapinch closing its mouth.
It might look a bit like Molgera.