Many Pokemon FireRed and LeafGreen players have just discovered a quality-of-life option that allows them to see a Pokemon's remaining HP in number form during Double Battles. Pokemon FireRed and LeafGreen were originally released on the Game Boy Advance in 2004, serving as remakes of the original Red and Green games. Game Freak incorporated many changes that were introduced in Pokemon Gold and Silver and Ruby and Sapphire, including Double Battles, Running Shoes, and the presence of Dark and Steel-type Pokemon.