Picross is ace. Mario is ace. So Mario’s Super Picross has to be acetwice, yes? Yes! And it is!
Downloaded it for the Wii Virtual Console this afternoon (along with Super Mario Bros.: The Lost Levels) and completed all the puzzled on Level 1 and Level 2. Nothing hard yet. Also unlocked Wario’s Super Picross in the process, although I’m not sure how I managed that.