So Mario was walking to Peaches castle for some tea. All of a sudden he came across some mysterious black goo. Then suddenly the black goo made a large hole and Mario through the hole! then he landed on an island called fur step island.

Mario saw Bowser, his enemy, but Bowser looked way different. Bowser could now breath fire, make pillars and fire balls fall from the sky and aim at Mario the shoot his fire laser and Bowser was so much bigger than before and he was a range of colors from orange to black.

But when Mario fell on fur step island he saw Bowser jr. and got closer to investigate. Bowser jr. said that he would never help Mario. Never ever! but anything to help fury Bowser turn back to normal so Mario agreed to help him. 

Mario collected cat shines to restore the light and cleanse fury Bowser and once cleansed, fury Bowser may be fought and restore all light and will banish all darkness but only can 100 cat shines cleanse all the darkness.

Mario didn't have 100 cat shines but it was round one of fighting bowser. Mario ran to the giga bell and became Giga Cat Mario.

Mario ran to fury bowser, attacking him every chance he gets. So Mario did a ground pound on fury Bowser.

Fury Bowser ran away, though he was not defeated. And then went back into his shell.

While Mario was collecting cat shines in peace, little did he know it didn't last long. Bowser was waking up and its was round two of fighting Bowser.