Credits to Shoebox Blog.

Hopping along was the man in red,
collecting coins and shrooms.
Stomping enemies right on the head,
from morning to dusk til noon.
Still hopping along, the man in red,
busting up blocks and turtles.
Holding down B, he dashed and he sped,
through all the pits and hurdles.
Reaching the fortress, the man in red,
caught sight of the Princess and Bowser,
Eating a shroom, they went head-to-head,
in a valiant effort to save her.
Saving the Princess and with Bowser dead,
victoriously stood the proud man in red.

~The (B) button