Also I am going to retcon something ever so slightly. We can chock it up to everyone not noticing it during the battle with Snagem, but the pokédexes has a special locator feature. Whenever three or more pokedexes of the same generation come together in close proximity they begin to beep, letting the holders know that other pokédex holders are near by Incase they ever get separated and meet back up. This way when everyone gets close together again at the power plant this will allow everyone to regroup and find each other. It’s a mechanic from the manga that all the pokédexes have if you guys haven’t read it.