The Hidden Move "Fly" has been around since the Pokemon Red and Blue days, and, of course, it makes a return in Pokemon Brilliant Diamond and Shining Pearl, allowing players to fast travel to any point of interest that they've already been to. In the original DS versions of Diamond and Pearl, trainers still needed to teach their Pokemon the Hidden Moves, or else using the HM was impossible. The remakes make using HMs much easier, as once the move is unlocked in the Poketch, players can use any Hidden Move without the need for their own Pokemon. The Poketch will basically somehow summon a nearby monster to do the work for players.