Fury Bowser

Fury Bowser is a form that Bowser takes in the Bowser's Fury mode of Super Mario 3D World + Bowser's Fury. In this form, Bowser becomes a gargantuan , being one of the largest physical forms he has ever taken (along with Giant Bowser). Similar to Black Bowser from Paper Mario: Color Splash, Bowser becomes corrupted by black paint, which causes his skin to become entirely black in color, complete with glowing yellow eyes without pupils, though in contrast, his hair glows a bright red and the center of his belly and the tips of his shell spikes glow yellow and red. In comparison to his normal self, his body is much larger than his head, his tail is somewhat longer, he has more spikes on his arm bands, and he also has more defined pectoral muscles, a trait shared by his Super Smash Bros. appearances.

Fury Bowser has amplified versions of his fire breath attacks. He can rain meteors across entire islands, and breathe long beams of fire at his targets. Compared to Bowser's normal roar, which is menacing but still cartoony-sounding, and even Dry Bowser's roar, which is less cartoony but still ferocious, Fury Bowser's roar is much more intimidating, sounding deeper and almost demonic, and has a reverberating echo effect to it.

He is seen terrorizing Lake Lapcat, and Mario, with assistance from Bowser Jr., works to take down Fury Bowser by using the power of the Giga Bell.

Typically, Fury Bowser awakens and goes on a rampage at intervals of roughly six minutes, but using the Bowser amiibo in the game can cause him to appear at the player's command. After a while, or if the player collects a Cat Shine, Fury Bowser will stop attacking and go back into his slumber.

By collecting all 100 Cat Shines in the Bowser's Fury campaign, Fury Bowser's hair, spikes and the glowing spot on his chest will become a shiny white color, though this is merely an aesthetic change that does not change any of Fury Bowser's abilities.

Trivia

 * Fury Bowser bears a resemblance to Bowser's appearance when using his Mega Strike in Mario Strikers Charged.
 * Fury Bowser and the material in his surroundings resemble, a typically dark fluid that can form spikes when influenced by a magnetic field.