Wonder Bowser

Not to be confused with Castle Bowser.

Wonder Bowser
Screenshot from Mario Portal
Applies to	Bowser
Item needed	Wonder Flower
First appearance	Super Mario Bros. Wonder (2023)

“Are you ready to lose yourself in the sweet beat?! This finale will make the entire universe my captive audience! BOWSER'S RAGE STAGE! HIT IT!”

—Wonder Bowser, Super Mario Bros. Wonder

Wonder Bowser is a form that Bowser takes on in Super Mario Bros. Wonder. He is only seen in the final course of the game, The Final Battle! Bowser's Rage Stage, serving as the final boss. Wonder Bowser is a large floating head made of stone with bright green eyes with bright pink pupils. He has black and neon green striped hair with uneven green glowing horns. Additionally, Wonder Bowser initially has two floating smoky hands, but gets up to four later in the battle. He makes up the apex spire of Castle Bowser, and is visible from its outside.

Wonder Bowser is fought in four phases. In phase one, he stays high in the air, shooting out Note Piranha Plants from his hands. Using the rhythm floors, the players must strike the large ! Switch under his chin at the right time to damage him. Afterwards, Wonder Bowser spits out a Big Note Piranha Plant that splits into four Note Piranha Plants when it makes contact with the ground. He then slams his arms into the ground in an attempt to crush the players. After taking more damage, Wonder Bowser floats into the background and spits out Note Piranha Plants and their larger variants from both sides of the screen. Afterwards, Wonder Bowser alters the floor into two colored sides and gets an additional arm.

The second phase is similar to the first, although Wonder Bowser stays above his hands to protect himself. The Big Note Piranha Plant also splits into six Note Piranha Plants instead of four. Before moving on to the third phase of the battle, Wonder Bowser alters the ground once more and creates a fourth arm.

In the third phase, the Big Note Piranha Plant now’s splits into eight Note Piranha Plants, and afterwards Wonder Bowser's arms each carry disco ball-esque Spike-Balls. He will toss them onto the stage, where they bounce offscreen. After taking even more damage, Wonder Bowser's hair will break, revealing a large Bowser Switch on his head.

In the final phase, there are airborne platforms that can be used to reach to Wonder Bowser, who is now high up in the air. His four hands each patrol different sections of the battlefield. When players are close to Wonder Bowser, he will breathe out smoke clouds that deal no damage but knock away characters that make contact with them. When the Bowser Switch on his head is pressed, Wonder Bowser will lose all of his Wonder Power and fall to the ground, ending the battle.

Names in other languages

Language	Name	Meaning	Notes
Japanese	ワンダークッパ Wandā Kuppa	Wonder Bowser

Gallery

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  Artwork of Castle Bowser, with Wonder Bowser positioned at the top

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  The beginning of the battle against Wonder Bowser

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  Wonder Bowser dropping Spike-Balls

Notes

• They way the player character destroys Wonder Bowser's stone armor over the course of the battle to expose his more vulnerable body beneath is comparable to the boss battle against Andross in Star Fox 64.