- Bowser cultivates the viruses in an attempt to conquer The Mushroom Kingdom - once infected, the people of The Mushroom Kingdom
laugh uncontrollably and cant»
t stop - Mario studies potential cures with the help of Princess Peach and Daisy - the trio uses the Sky Pop to rain down capsules over the kingdom to save the day - one virus escapes and infects Luigi - Mario shrinks down in the Marine Pop to try and save him - Bowser somehow also gets into Luigi's body and Mario battles the viruses to save Luigi's lif