Mega Bowser

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This article is about Bowser's giant transformation after powering himself up. For information about other uses, see here.
Mega Bowser
Applies to Bowser
Item needed Various
Power(s) given Increased size
First appearance Mario Party 5 (2003)
Latest appearance Mario Kart Tour (2019)

Mega Bowser is a form Bowser takes on in the various spinoffs such as Mario Party and Mario Kart. In this form Bowser is usually much tougher and his attacks are more advanced. He also gains some new moves while in this form.


Mario Party series

Mario Party 5

“Drat! You've made it this far! I guess the only thing I've got now is this... So long, runt!”
Bowser, Mario Party 5

Mega Bowser appears as the second stage of Bowser's boss minigame, Frightmare. After the player defeats Bowser by tricking him into ground pounding through the floor, the entire floor falls apart beneath them and they plummet to another boss stage. Bowser then drinks an elixir that transforms him into Mega Bowser. Unfortunately, his weight breaks the floor underneath him and he is forced to hang on to the edge of the stage.

During the fight, Mega Bowser will toss large red orbs that explode, leaving behind a smaller black orb. He will then breathe a stream of fire. The player must get him to hit an orb with his fire, turning it white. They can then pick it up and throw it at him. After the fire attack, Mega Bowser tosses a purple orb that sends a shockwave across the stage, requiring the player to avoid it before they throw the white orb. Mega Bowser will toss more red orbs each time he is hit. After he is hit five times, The black hole in the background sucks Bowser in.

Mario Party 9

Mega Bowser appears as the final boss of Mario Party 9, in the minigame Bowser's Block Battle. Players attack by rolling dice with their own face and Bowser's emblem on them. They are able to pick up and throw the dice repeatedly for 10 seconds. After the 10 seconds are up, dice showing players' faces are converted into energy balls that the players use to attack Bowser, gaining one point per hit, while Mega Bowser shoots three fireballs for each die showing his emblem, deducting a point from any player hit.

Once his health drops below half, Mega Bowser grows even larger and the second phase of the fight begins. Mega Bowser will now tilt the platform the players are on to add chaos to their rolls. After each set of rolls, Bowser will pull out a spiked dice block with images of the previous bosses on it and roll it. The die transforms into whatever boss is rolled and will perform a brief attack.

  • Wiggler walks around the arena three times before leaving.
  • King Bob-omb drops into the middle of the arena and makes Bob-ombs fall out of the sky.
  • King Boo will summon groups of Boos that spin in gradually-expanding circles. The first group spins clockwise or counterclockwise and the second group spins in the opposite direction.
  • Blooper floats near the front of the arena (where Bowser is) and tosses ten Urchins at the players.
  • Chain Chomp drops into the middle of the arena and charges at the players. When it hits a wall, it will change direction. Players must dodge a few charges before Chain Chomp leaves the arena.
  • If Bowser rolls his own image on the dice, he'll launch five waves of fireballs straight ahead. The waves alternate between three and four fireballs, forcing players to weave between them.

After Mega Bowser's health is depleted, he is launched into the black hole in the background and explodes, releasing several Mini Stars.

Mario Party 10

In Bowser's Boss Minigame Bowser's Tank Terror, after being shot by enough cannonballs from the tanks, Bowser falls into the lava, only for himself to reemerge as an enlarged Dry Bowser, who is roughly the same size as Mega Bowser.

Super Mario Maker / Super Mario Maker for Nintendo 3DS / Super Mario Maker 2

Mega Bowser spitting fireballs

Mega Bowser can be reproduced in Super Mario Maker, Super Mario Maker for Nintendo 3DS, and Super Mario Maker 2 by adding a Super Mushroom to regular Bowser. In these games, Mega Bowser spits larger fireballs and can toss larger hammers.

Mario Kart Tour

Mega Bowser in Mario Kart Tour

In Mario Kart Tour, some bonus challenges have featured Mega Bowser as a racing opponent, appearing as a separate entity from Bowser. Like other mega opponents, he can produce items anytime, namely Green Shells and Bob-ombs, and use them against the player. When the player bumps into Mega Bowser, they crash. The first bonus challenge to feature Mega Bowser was part of the Bowser Cup in the closed beta. Mega Bowser later returned in the release version in the bonus challenges of Paris Tour's Metal Mario Cup and London Tour's Bowser Cup.