>>17002123HGSS were the best games from the sheer amount of thought put into the game's aesthetics and mechanics
full touchscreen controls so i never have to use the fucking face buttons, smudge up my screen, or switch between face buttons and stylus constantly
pokewalker not only allowed you to be with your bro, you could play low power pokemon on the go, but you could mystery gift with friends AND you could download their party to battle in the game (and yet this is completely missing in a game with streetpass)
more pokeballs, and the biggest variety in catchable pokemon probably beat only by XY (the first 251, the evolutions to not fuck up the dex, sinnoh pokemon, hoenn pokemon, and pokewalker pokemon)
constant running shoes so you don't have to press the face button
on screen quick items
fully touch controlled PC