Ah, New Super Mario Bros. for DS was probably the best NSMB game, since it was the first. To get to those 2 worlds, simply beat the boss as mini-mario to unlock. NSMB Wii was good and had great new power ups, as well as 4 players at once. I'm not a huge fan of NSMB Wii U, because I felt like I was playing the same rehash of mario. I still haven't even played New Super Luigi yet, even though I own it. I also don't own New Super Mario Bros 2 on 3DS yet.
Super Mario 3D World on Wii U plays like Super Mario 3D Land on 3DS. Both games are FANTASTIC and really feel fresh and classic at the same time. I especially like the Wii U one, as it has an awesome jazzy soundtrack, great colorful worlds, plenty of variety, and also has 4 players at once. And who couldn't love the new Cat Mario suit?
Thanks for the tip.
I've played both NSMB versions, i.e, DS and Wii U and I've gotta say that the DS definitely feels a lot more challenging, plus the graphics on the DS (playing on a DS Lite) look pretty nice to this day too.