Capcom has announced new free DLC for Monster Hunter 4 Ultimate, a new pack will be released on the first Friday of every month and the April line-up includes additional quests and equipment, as well as Super Mario Bros. and Sonic The Hedgehog collaboration gear.
Quests will be available from the "Event Quests" tab of the Questarix and "Challenge Quests" through the Arena Bambina in the Gathering Hall.
To get the DLC, simply connect your 3DS to the internet, boost up your copy of Monster Hunter 4 Ultimate, hit the DLC menu, and download the content.