Easy Way: He is A Flying type DUUHH Flying types well.... USUALLY FLY!
"Scientific" Way: Gyarados manipulates the water in the air to stay afloat. Due to so little water molecules Gyarados must use alot of molecule that is why in the Games He looks a little slow. (But he is actual fast)
This goes for ANY Water type Pokemon even Sharpedo, what is cool and wierd about Sharpedo is that it looks like he needs NO water BUT, I think he use the water in the air to not die its simple he takes the water in the Air and Passes through its gills rapidly that is why he is Fast. He flies fast because the water passes through his gills so he LEGIT has to run for its life...
Sorry this was mostly about Sharpedo but hope you liked this Theory!
"Scientific" Way: Gyarados manipulates the water in the air to stay afloat. Due to so little water molecules Gyarados must use alot of molecule that is why in the Games He looks a little slow. (But he is actual fast)
This goes for ANY Water type Pokemon even Sharpedo, what is cool and wierd about Sharpedo is that it looks like he needs NO water BUT, I think he use the water in the air to not die its simple he takes the water in the Air and Passes through its gills rapidly that is why he is Fast. He flies fast because the water passes through his gills so he LEGIT has to run for its life...
Sorry this was mostly about Sharpedo but hope you liked this Theory!