Original: Throughout the series ' history , there have been several kinds of Mushroom power-ups , including a 1-Up Mushroom , which gives Mario an extra life ; Poison Mushroom , which causes Mario to either shrink or die ; Mega Mushroom , which causes Mario to grow very large ; and Mini Mushroom , which causes Mario to shrink .
Simplified: New Super Mario Bros. introduced other types of Mushroom power-ups , such as the '' Mega Mushroom '' , which causes Mario to grow to screen-filling proportions and the Mini Mushroom that makes him shrink to a very small size .