i heard a rumor that in the NES version there was a "secret world" where it would be negative or something. if thats true, does it work for the gba version, or was it fixed? if it works for gba, does anyone know how to do it?

its does but I have not tryed it

wait, how do you do it?

i couldent be botherd to register

Minus World
Go to world 1-2.
At the end of the level, there is a pipe, and some bricks.
You must smash the second to last brick and the third to last brick as seen to the left.
Now you must stand on the edge of the pipe, duck, and face left
Now jump to the right towards the one block that you didn't break, while facing left
You should slide right through the bricks, go into the first pipe when you get to the other side.

You should be warped to the minus world, the level is -1

i heard about this a lot, and have tryed it. doesent work for me, though. maybe i'm doing somthing wrong...

It does work, as I have done it before. It sends you to an underwater level, and when you beat it you continue to replay it over and over again until you finally die.