Battle Opponents in New MapleStory M 2v2 “Monster Carnival” Dungeon Update Update Includes Character Rebalancing & Cherry Blossom Box Event!  LOS ANGELES – February 28, 2019 – MapleStory M, the free-to-play, massively multiplayer online mobile game for iOS and Android, brings a variety of content to players, including a new competitive dungeon, character rebalancing, and…