The sidekick system allows low- and high-level players to team up for XP bonuses foe questing together. XP is shared between partners and special buffs are applied for every hour the duo lasts.With Legends, a trio of new heroes: The Cannoneer, Mercedes and the Demon Slayer. maplestory mesos. All three wield pretty awesome power as this trailer vividly shows.MapleWorld will be infested by ghosties, ghoulies and creatures of the night and a new Halloween themed dungeon will make its appearance as well.