A great plotline for a hack would be that Bowser invented something called a 'Vanilla Bomb' and is planning to take over the world using it.
The hack has custom graphics, and lots of ASM gimmicks, and at one point in the hack, you meet Bowser and he detonates the vanilla bomb, causing all the graphics to revert to normal, and all the ASM to disappear. You then have to search for something called the chocolate ray, which causes everything to come back so you can beat Bowser.
Oh, and the hack should have at least one floating muncher.
Now with extra girl and extra hacker
The hack has custom graphics, and lots of ASM gimmicks, and at one point in the hack, you meet Bowser and he detonates the vanilla bomb, causing all the graphics to revert to normal, and all the ASM to disappear. You then have to search for something called the chocolate ray, which causes everything to come back so you can beat Bowser.
Oh, and the hack should have at least one floating muncher.
Now with extra girl and extra hacker