You can't win any of challenges without buying it for about $500. I have been playing this for 5 years and have only won 3 trophies to advance in the game. You cannot join a team to help each other out. They limit you the number of characters at 100 you can use. But I have about 300 and need to constantly add and remove them to complete challenges or level them up. There is no more fun in Disney anymore. Unless your on the Disney side of the fence