how can i give someone my edited level in M vs L if he don't have the game?

You cant. SInce he doesnt have the game

AFAIK, MvsL edited levels only work with people having your modded ROM
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--' but that levels are so boring

You need two flashcards, and put the ROM in the two flaschards, then play it.
OR you can use Download Play. To do that you should use the "DLP-friendly mode" in NSMB Editor, or it won't work.

1- Open a clean (unedited) ROM in NSMBe.
2- Enable DLP-friendly mode in the Tools tab
3- Edit whatever you want
4- Close the editor.

It won't work if you have already edited the ROM without enabling DLP-friendly mode.

and if i edited a normal level befor without MvsL is that a problem?

if you edit ANYTHING without enabling DLP-mode in the editor it WILL NOT work.

so i have to delete everything i've edited in world 8 and 6 ?






EDIT------>so that also mean that all my worlds will be reset and i have to play all the levels again?

You can get a new unedited ROM, enable DLP mode, and then import everything you've modified.
And then you have to remember to enable DLP mode every time you open the ROM.

So it'll be easier if you use a separate ROM to make MvsL levels.