I just an idea on how to expand it. This one can have all the element types (Normal representing the original stage) implemented and all of them will have hazards. Some by the stages themselves, other by the Pokémon in the stage. Think on some of the stages where Legendary and Mythical Pokémon appeared in and interacted with the stage with their power. This one will not have the Legendary Pokémon or Mythical Pokémon, but the what the Pokémon do in the stages will be no less effective.