In Super Mario 64 right leval 1-2 right before you go to the next part on the wall going up you can find an opening and there are 3 tubes leval 2 leval 3 and leval 4
You need to beat the Skeleton pokey being tiny.
(In the castle at the end of world 2)
Technically, Super Mario World is already Super Mario Bros. 4. In fact, its working title before being released was "Super Mario World: Super Mario Bros. 4."
Beat the world 2 boss as Mini Mario.
Well they are in Mario party 4 and in super Mario Galaxy...
If you are talking about a sequel to super Mario bros. 3, no,if you don't count super Mario world.
Super Mario World is Super Mario Bros. 4. In fact, before it was released, it even had the subtitle of Super Mario Bros. 4. The subtitle was removed at some point before the game's release.
if you mean ds,beat world 2's boss as super mini mario.
Beat world 3
How do you get to world 4 on super mario bros ds?
In Japan, there was. It is labeled on the Super Famicom package of Super Mario World. In the rest of the world, not yet. I guess the NES would have to be resurrected for that to happen.
By going into a cannon
in Mario Bros. Wii it is the Beach world. In Super Mario Bros. DS, it is Jungle world
World 4-4