Latios the Eon Pokemon. "Latios will only open its heart to a Trainer with a compassionate spirit. This Pokémon can fly faster than a jet plane by folding its forelegs to minimize air resistance." - Sapphire Pokedex Entry. //
Mega Latias is incredibly similar to Mega Latios, and it is currently unknown why they converge to the same design. They can fly faster than a supersonic jet. If you listen close, you can hear the screech of them flying in the roaring skies.