Dark Bowser

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This article is about the final boss from Mario & Luigi: Bowser's Inside Story. For information about the boss from Super Paper Mario, see here.
Bowser's Inside Story Enemy
Dark Bowser
Dark Bowser-In game-Battle-Idle-First frame-No empty space.png
Location(s) Peach's Castle
Battled by
HP 1,000/1,500 (with challenge medal)
Power 344/860
Speed 37/56
Stat Down?
Coins 0
Item Drop None
Internal ID

“Soon this kingdom will vanish along with all who dwell within. And you, too, will sleep eternally in the dark power's embrace!”
Dark Bowser, Mario & Luigi: Bowser's Inside Story

Dark Bowser is Bowser's final boss in Mario & Luigi: Bowser's Inside Story. He has all the powers Bowser has, along with many dark variations as well. It seeks to cover the world in darkness and destroy it.


Dark Bowser looks similar to Bowser, in terms of build. His skin and shell are colored dark blue. His snout, stomach, horns and spikes are noticeably paler than Bowser's. He also has Dark Star-esque red eyes. The rings around his spikes and horns are black. The most noticeable difference from Bowser and Dark Bowser is that Dark Bowser has a black mohawk.


Mario & Luigi: Bowser's Inside Story[edit]

Bowser battling Dark Bowser, who's fully powered by Dark Fawful.

It has been requested that this section be rewritten.

While the Dark Star was gathering DNA from Bowser's body, Mario and Luigi tried to stop it before it succeeded. The brothers managed to defeat it, but apparently, it had already absorbed every piece of DNA that it needed, and it transformed into Dark Bowser, although still in a ghost-like state because he was incomplete. The only parts missing were the legs, which it obtained by inhaling Dark Fawful, thus completing his form, and becoming solid in the process. He flees from Bowser, but when Bowser finds him in the secret tower of Peach's Castle, they both execute flame breath attacks that clash with each other, initiating the prologue to the final battle. Bowser overwhelms Dark Bowser, then they both curl up into a spike ball and the fight commences. Bowser again overwhelms his dark form, who then unleashes a dark hurricane over the Mushroom Kingdom, trapping Broque Monsieur, the Blue Paratroopas and several Toads and Goombas in bubbles. Bowser is now the only one who can defeat his doppelganger.

One of Dark Bowser's attacks is throwing a boulder into the air and blasting it apart, causing rocks to fall from the sky. Bowser must duck with his shell to avoid taking damage. However, he must also punch one of the rocks at Dark Bowser, who is charging a massive blast of dark fire. When the rock lands in his mouth, the attack's energy recoils and he inflicts damage on himself from the inside. If Bowser does not do this, however, he takes damage from the blast.

Dark Bowser breathing fire at Bowser.
Another attack involves him punching Bowser repeatedly. Bowser must counter with his own punch, making their fists clash and negating any intended damage. The two giant blows meet and throw the titans back, creating a shock wave. Then Dark Bowser will jump into the air as a spiked ball and try to land on Bowser. Bowser must bare his shell to protect himself. He can then counterattack by quickly throwing a punch at Dark Bowser. Another attack traps Bowser in a cage and raises it into the sky. Dark Bowser will then charge up an energy ball to launch at Bowser. Bowser must try, by punching repeatedly, to destroy the cage's lock before he gets hit by the energy ball (he should have just about enough time). He can also swing the cage off its hinges with Shell Defense to damage Dark Bowser.

After taking enough damage, Dark Bowser will fall to the ground; he is then fully healed by the ingested Dark Fawful and will grow larger. He will always follow this up (assuming Bowser did not make Dark Bowser's HP fall to 0 via counter-attacking) by tossing a mixed ball of "Dark Minions" at Bowser, including dark versions of Goombas, Koopa Troopa, Thwomps, Bob-ombs, and Bullet Bills. The ball pushes Bowser back several meters, after which he must then walk back through the "Dark Minions" while dodging or countering their attacks. When returns to the field, Dark Bowser again curls up into a spike ball and tries to slam into him from above. Bowser must defend with his shell, then do it again as Dark Bowser prepares the next spike-ball slam. Bowser has to attack his stomach so that he spits up the Dark Star Core then inhale him, which Dark Bowser will try to counteract it with his own inhaling technique. Successfully inhaling Dark Fawful pulls him into Bowser's belly, where the Mario Brothers must fight Dark Fawful. After several turns of fighting Dark Fawful, he will escape and return back into Dark Bowser's body, forcing the process to be repeated. Only upon Dark Fawful's defeat can Bowser give his shadowy doppelganger the final blow(s). Once defeated, Dark Bowser dissolves, leaving only the Dark Star, which rises into the air and explodes, restoring the Mushroom Kingdom to normal.

While Dark Bowser is incomplete, he speaks extremely slowly. However, as he becomes complete, he starts to speak fully. In the Japanese version, his speech is halted and written completely in katakana while he is incomplete. When Dark Bowser inhales Dark Fawful and is completed, he begins to speak in more natural Japanese, with kanji and no pauses.


  • "Your body, I have copied... Your power, I have copied..."
  • "Not enough...power..."
  • "Not enough...dark power..."
  • "I am not complete..."
  • "The dark power slept so long, and now it wakes... It must be freed... BEHOLD!"
  • "Still here? Has the dark power not yet crushed your puny hopes? Soon this kingdom will vanish along with all who dwell within. And you, too, will sleep eternally in the dark power's embrace!"
  • "I have...fallen...To come so far...so far..to lose..."
  • "Dark...Even with the dark power completed...The unthinkable happened..."

Names in other languages[edit]

Language Name Meaning
Japanese ダーククッパ
Dāku Kuppa
Dark Koopa; "Koopa" being Bowser's Japanese name.
Spanish Bowser Oscuro Dark Bowser
French (NOA) Bowser Sombre Shadow Bowser
French (NOE) Bowser Noir Black Bowser
German Finster-Bowser Dark Bowser
Italian Bowser Oscuro Dark Bowser
Chinese 黑暗庫巴
Dark Bowser


  • Dark Bowser is the third final boss that is a different form of Bowser, the first two being Bowletta and Shrowser, and the fourth and fifth being Dreamy Bowser and Shiny RoboBowser. However, he is the only one who isn't actually Bowser, because he only looks like Bowser, and is actually the Dark Star.
  • His voice is a slowed-down version of Bowser's.
  • Dark Bowser is similar to the Fright Mask from Paper Mario and its sequel, only with yellow eyes and a darker palette.