In the opening of Mario Tennis, several characters play in a tennis tournament. Wario and Waluigi lurk on the sidelines of the court, and seem upset that. The best place to get cheats, codes, cheat codes, walkthrough, guide, FAQ, unlockables, tricks, and secrets for Luigi's Mansion: Dark Moon for Nintendo 3DS. Search the history of over 505 billion pages on the Internet. search Search the Wayback Machine Haunted Towers Gems - Luigi's Mansion: Dark Moon: There are 13 Emeralds to be found in the Haunted Towers, and certain gems can only be obtained in certain missions. Haunted Towers is the second mansion undertaken in Luigi's Mansion: Dark Moon. A mansion owned by the late Three Sisters, the Haunted Towers has fallen into a state.