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Not only the main gameplay and storyline.
But Battle Frontier was legendary, before this, the game would simply end and it would be over, you could complete your pokedex but that could only be so much fun and last so long. Battle Frontier gave limitless hours of addictive combat and challenge to try and complete the game, it was impossible to get all the gold brains and was barely heard of if any of your friends had all 7 silver brains. This was the most fun I ever had in any pokemon game, you would really have to strategize deeply on how to complete the frontier.
