I stayed awake till 9:45 am trying to do the shot. The picture has more in it that it shows, as both Gyarados and Magikarp are doing their special moves, being hydro pump and splash, but funny thing is, both sprites of the attacks are incompatible with each other when you check the photo in the album, so only 1 shows at a time. I wanted the shiny splash stars to be in there and also some water from hydro pump so I had to pester ball the karp to get it into the waterfall, position the vehicle, apple a certain poligon of water to bring out a water pokemon, had luck for it being a magikarp (dratini and goldeen also appears, or nothing at all), and then that magikarp must do a splash, and it’s jump timed perfectly so it doesn’t overlap to hydro pump. Think I tried it like 400 times. Pain in the ass but it was totally worth it, thanks for doing this possible!