Pokemon players don't depend so much on having Pikachu. I mean, the Pikachu of the anime and the one in the manga already fulfilled their roles as cute "powerful" creatures. It's more nostalgia than anything, otherwise they would have given it or Raichu a much more decent base stats by now. I don't think it's necessary for every region to have Pikachu references. I would rather have Red cameos or something else. Aside from being the most known Pokemon, it just should keep appearing as c gear skins or pc wallpaper.