Does anyone know how to upgrade/level up your 2 person attacks? I see vids on the internet showing new specials for the characters, but I still only have the original ones. I have beaten the game, Another day and gotten 9/21 secret reports so far. Do I just continue to level up my character to unlock these, or are there stickers that I need to buy? I've been tempted to use cheats to get these things, but I stopped myself. This is my favourite DS game and in my top 5 all-time, so I don't want to regret a decision like that.