Cheat to receive lives/free mushroom houses!
Go to W1-1 and get the Super Mushroom, let it walk ahead of you for a couple of seconds and catch it then. This will allow you to break the stairs and flagpost at the end of the level, therefore you will get five free lives (the lives depend on how much damage you cause and 5 is the most at one time!)
If you finish any level on an even number (time-wise) you will open up a free mushroom house at the start of that world. Try ending on -11,-22,-33 etc etc and you can open weapon houses, super mushroom houses and life houses!
Hope I helped! (:
Added by: LadyHayley Jan 20th 2009, ID#10095