Integrated file browser: Browse, extract and replace files in the ROM easily without a separate program, for more advanced hacking.You can also click and drag to scroll the view. Mini-map: Click the View Mini-map button to show a mini-map of the level you’re currently viewing.You can modify objects, sprites, entrances/exits, views and paths - so practically anything in the level can be edited!
A level editor for the DS game New Super Mario Bros, originally made by Treeki and now maintained by Dirbaio.