Mégapod, robot géant à trois pattes aux grands yeux lumineux, dans sa version de Super Mario Galaxy, le film

Megaleg: Bowser Jr.'s tripod robot in Super Mario Galaxy

2201 words | Reading time : 11 minute(s)

BossSuper Mario GalaxyBowser Jr.

A giant three-legged robot you climb under fire, with a Grand Star caged on its head. Megaleg, Bowser Jr.'s robot, guards a Grand Star in his Robot Reactor in Super Mario Galaxy. This profile covers its tripod silhouette, the climb and the trick that bring it down, its behind-the-scenes link to Zelda, its missed comeback in Super Mario Galaxy 2, its role in the 2026 film and its names.

A Launch Star has just flung Mario into the heart of Bowser Jr.'s Robot Reactor when Bowser Jr. himself pops up, sure of his victory: “Go at 'em, Megaleg! Stomp 'em with the power of your Grand Star!” At the very bottom of the reactor, a gigantic three-legged robot lurches into motion. Meet Megaleg, known as Mégapod in French, a boss from Super Mario Galaxy, released in 2007.

On its head, a red cage holds a Grand Star, which Mario will have to free by turning the robot's own shots against it. Behind this dizzying duel lie an idea first planned for Zelda, a four-legged prototype, a return wrongly announced for Super Mario Galaxy 2 and a second career on the big screen in 2026.

Contents

A fly-eyed tripod on a planet made to measure

Megaleg is a gigantic mechanical construct belonging to Bowser Jr. Its head vaguely resembles an Octoomba's, and the whole machine stands on three long legs, like a tripod. Each of them is riddled with traps and mechanisms designed to trip Mario up.

Its fly-like eyes project huge beams of light. On top of its skull sits a red cage, crowned with a rotating light reminiscent of a lighthouse: this is where the Grand Star is locked away. The robot is so imposing that it occupies a planet just big enough to hold it.

This silhouette may be a tribute to the Martian tripods, the fighting machines of The War of the Worlds. Its Octoomba-like head would then echo the octopus-like appearance of the Martians described in the novel.

Megaleg seen from below, towering over its small planet, its grille-covered eyes projecting a large beam of light into space, in Super Mario Galaxy
Seen from below, Megaleg towers over a planet just big enough to carry it, while its fly-like eyes project huge beams of light into space.

Climbing a leg under a hail of Bullet Bills

The duel takes place in Bowser Jr.'s Robot Reactor, reached from the Terrace, during the “Megaleg's Moon” mission, which the European French version titles “Le gros truc à trois pattes” (roughly “the big three-legged thing”). The Canadian French version prefers “La Lune de Mégapod”. The fight also features in the game's Nintendo Switch port.

As soon as Bowser Jr. gives the order, the giant goes on the offensive. Megaleg relentlessly fires Bullet Bills from its head, legs and underbelly, and tries to stomp the plumber underfoot.

To reach it, Mario must jump onto one of its three giant feet, then climb up the leg while dodging the projectiles. The fight also has him crossing moving gears.

🎲 Climbing a giant leg while dodging Bullet Bills takes a cool head and quick reflexes: to put yours to the test with the whole family, discover our Mario board games.

Mario climbing Megaleg's mesh leg as three Bullet Bills burst out of their cannons, in Super Mario Galaxy
To reach the robot's head, Mario must climb Megaleg's leg while Bullet Bills burst out straight ahead of him.

Redirected Bullet Bills to open the Grand Star's cage

Once at the top, Mario changes tactics: he must lure a Bullet Bill into the large cage surrounding the red cage. The robot hits back at once. A barrier forms around the red cage, the shots intensify and the music speeds up.

He must then guide a second Bullet Bill straight into the red cage. The impact frees the Grand Star, which Mario collects, and finishes off Megaleg, which explodes immediately.

Trading card no. 27, devoted to the robot, sums up the strategy in one clear instruction: confuse its own Bullet Bills so that they slam into its head.

The fight can even be bypassed: a glitch in the game lets the player reach Megaleg's planet without triggering either the cutscene or the battle.

Megaleg breaking apart above its planet, head and legs flung into space, in Super Mario Galaxy
Guided straight into the red cage, the second Bullet Bill frees the Grand Star and blows Megaleg apart, its head and legs scattering above its planet.

An idea planned for Ganon and a prototype called BossCrab

Climbing onto a giant and moving around on its body: according to Nintendo Power magazine, in issue 225 from February 2008, this concept was originally meant for the final battle against Ganon in The Legend of Zelda: Ocarina of Time.

The idea was dropped for a simple reason: perched on the monster, the player could no longer see Ganon. It was eventually revived in Super Mario Galaxy, much to the excitement of the development team.

Megaleg changed a great deal before release. In the E3 2006 demo, its cage was still empty. Its earliest version, labelled “BossCrab”, had a different body, no nose or mouth, a half-oval head and four legs instead of three.

The game's files leave no doubt about its nature:the robot goes by the internal name TripodBoss, and the object table calls it Sankyaku Bosu. Both names mean “tripod boss”.

🧩 From the four-legged BossCrab to the final tripod, Megaleg changed shape before finding the right one: to assemble a scene from the Mario universe piece by piece yourself, discover our Mario puzzles.

Replaced by Digga-Leg in Super Mario Galaxy 2, glimpsed in Super Mario Run

In February 2010, a preview of Super Mario Galaxy 2 published in issue 251 of Nintendo Power announced Megaleg's return. The promise never came true:Digga-Leg, a boss of the same kind, took its place in the sequel.

Megaleg is nonetheless far bigger than Digga-Leg, which has only two legs and whose eyes give off a red glow.

The robot did still make a discreet return on mobile. It does not appear in person in Super Mario Run, but a piece of Super Mario Galaxy artwork featuring it showed up in the missions list during the event dedicated to Super Mario Galaxy + Super Mario Galaxy 2.

Piloted by Bowser Jr., Kamek and then Yoshi on the big screen

In 2026, The Super Mario Galaxy Movie turns Megaleg into a mech that can be piloted. In its first scene, Bowser Jr. takes the controls to confront Rosalina on the Comet Observatory and try to capture her. The start of this duel was shown in the Nintendo Direct devoted to the film on 12 November 2025.

Rosalina fends it off with her wand and is about to defeat it. But a Luma leaves the Library, and the robot targets it with a barrage of Bullet Bills. Rosalina destroys most of them and only just stops the last one from harming the other Lumas. That moment of distraction is all Megaleg needs to grab her and carry her off to the UFO.

Later on, it is Kamek who pilots the machine: he sends it crashing through the floor of Peach's Castle to back up Bowser Jr., who is fighting Mario, Luigi and Yoshi. No sooner has he arrived than the sorcerer is turned into an egg by Yoshi, who promptly jumps into the pilot's seat.

Yoshi then accidentally fires a rocket thruster under the robot, which flies off with Bowser Jr. and Kamek all the way up to the UFO. The two villains escape just before Megaleg hits the ship's ceiling and explodes, destroying the emitter of the tractor beam: the castle falls and crash-lands in the Honeyhive Galaxy.

The robot also appears on the film's final poster. Nintendo Today! devotes a collectible card to it, also released in a gold version, whose English text describes it as the massive three-legged robot used by Bowser Jr. in his attack on Rosalina.

Rosalina, seen from behind, facing Megaleg and its two large glowing eyes in The Super Mario Galaxy Movie
On the big screen, Megaleg becomes a mech that can be piloted: Bowser Jr. takes the controls to confront Rosalina and try to capture her.

From Megaleg to Tribot, the names of a three-legged giant

The name Mégapod is shared by the European and Canadian French versions of the game, and the French edition of the Super Mario Encyclopedia, published in 2018, uses it too. The French edition of the official Super Mario Galaxy sticker album, in 2010, more casually calls it the “Grand Truc à trois pattes”, a phrase close to the European French mission title.

English and Japanese say the same thing: Megaleg on one side, Megareggu on the other, in other words “mega leg”. Korean follows suit with Megaregeu, German translates it as Megabein, and Simplified Chinese opts for Jīxiè Jùtuǐ, “mechanical giant leg”.

Other languages focus on the tripod. The Italian Tripodobot blends “tripode” (tripod) and “robot”, Spanish settles on Megatrípode on both sides of the Atlantic, and Brazilian Portuguese on Megatripé. The 2025 Switch port gives it the Dutch name Tribot, formed from the Latin prefix tri- and “robot”.

Megaleg at a glance

French name Mégapod (“le Grand Truc à trois pattes” in the 2010 sticker album)
Original name Megaleg (internal name: TripodBoss)
First appearance Super Mario Galaxy (released in 2007)
Nature Giant three-legged robot owned by Bowser Jr.
Lair Bowser Jr.'s Robot Reactor, “Megaleg's Moon” mission
Attacks Bullet Bill fire, attempts to stomp Mario
Weak point Its own Bullet Bills, guided into the cages on its head
Reward A Grand Star
Prototype BossCrab, with four legs
On the big screen The Super Mario Galaxy Movie (2026), piloted by Bowser Jr., Kamek and then Yoshi

🎭 On the big screen, Bowser Jr., Kamek and then Yoshi take turns at Megaleg's controls: to step into the shoes of one of them yourself, discover our Mario costumes.

FAQ

  • Who is Megaleg in Super Mario Galaxy?
    Megaleg, called Mégapod in French, is a giant three-legged robot owned by Bowser Jr. It occupies a planet in Bowser Jr.'s Robot Reactor and guards a Grand Star locked in a red cage on top of its head.
  • How do you beat Megaleg in Bowser Jr.'s Robot Reactor?
    Mario must jump onto one of its feet and climb up its leg while avoiding the Bullet Bills. On its head, he lures a first Bullet Bill into the large cage, then a second into the red cage, which frees the Grand Star and blows up the robot.
  • What is the link between Megaleg and Ocarina of Time?
    Nintendo Power magazine reports that the idea of climbing a giant was planned for the final battle against Ganon in The Legend of Zelda: Ocarina of Time. It was dropped because the player could no longer see Ganon once on top of him, then reused for Megaleg in Super Mario Galaxy.
  • Does Megaleg return in Super Mario Galaxy 2?
    A preview published by Nintendo Power in 2010 announced its return, but the promise never materialised. Digga-Leg, a boss of the same kind, smaller and with two legs, appears in the sequel instead.
  • What role does Megaleg play in The Super Mario Galaxy Movie?
    The film turns it into a mech that can be piloted. Bowser Jr. uses it to capture Rosalina on the Comet Observatory, then Kamek has it burst into Peach's Castle, before Yoshi, at the controls, accidentally sends it to explode inside the UFO.
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