Name: Top 20 Hardest Super Mario Bosses
Uploaded: 2026-03-10T17:16:57.000Z
Duration: 21 min 12 s
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Welcome to watchmojo, and today we're looking at the toughest boss fights found in the Super Mario series.

While it isn't exactly known for having hard bosses, we believe these offer players the greatest challenges.

Do note that we're only talking about Mario's mainline games today, none of his RPGs or other spin offs.

This mech operated by Bowser Jr. Comes with a lot of firepower.

Mario must use Yoshi to grab bullet bills and hit specific spots while dodging others.

Along with banzai bills and shockwaves sent out by its massive hammer hands.

It's likely you'll get hit at least once or twice, but the fight is manageable.

The trouble and what earns Mega Hammer, along with several other bosses, a spot on this list is the Daredevil Comet version.

Here you lose the fight if you take a single hit, where you have a sizable safety net to deal with.

In the original version, the Daredevil iteration will likely rack up a few deaths before you claim victory.

Ludwig von Koopa Super Mario Bros. 3 I always found the penultimate boss from Super Mario Bros. 3 harder than Bowser himself.

Admittedly, part of this is because the airship leading to him is a huge pain to navigate, making it hard to hold onto a power up.

Ludwig combines several elements from previous boss fights.

While rolling around in his shell, he fires projectiles, and

every time he lands on the ground, it shakes the entire arena, stunning you.

That means you have to keep jumping around, because getting stunned and then hit is a hassle.

At least it still only takes three jumps on the head before he goes down.

The final fight in this Game Boy Classic throws a wrench in what's expected of a traditional Super Mario boss.

Mario pilots a plane, as does Tatanga, and the two duke it out in the air.

The fight is relatively simple from a mechanical standpoint, but

it requires a lot of dodging on your part.

Tatanga's projectiles break into three and spread across the tiny screen, so your reaction time will need to be top notch to avoid being hit.

Of course, his projectiles destroy yours, but aren't stopped themselves, and

When it comes to the final boss of Super Mario Bros. 2, Timing is everything, and

not every player will be able to get it right the first time they face wartime.

He really only has one attack, which is nice.

He'll spray a stream of harmful bubbles forward, which descend in an arc.

Mario must catch A vegetable that pops out of a tube and throw it into Wart's mouth to deal damage.

The only problem is that there's a small window to do this, either right before Wart starts shooting his bubbles, or in between them, which is harder since they destroy the vegetable instantly.

Hitting that window at the right moment while also dodging projectiles when you're not attacking can be a tad frustrating.

Another boss where timing can be an issue is Bowser from Super Mario World.

He flies around in his clown car, tossing mechakoopas at Mario.

You have to jump on one of these, grab it, and

hurl it directly up to so that it lands on Bowser as it falls back down.

If you mistime the throw, you'll either miss Bowser as he flies by, or hit the clown car, which is invincible, and

then have to wait for him to attack again.

After a few hits, he'll rain down fireballs, which can be a little tough to dodge since they're spaced so closely together.

Thankfully, the cannonballs he produces are easier to avoid, and

Peach will appear to give you mushrooms if you need them.

As the final boss in the Super Mario Land sequel, Wario kicks the things up a notch with three phases.

During the first, he'll try to squash Mario while generating shockwaves each time he lands, which both stun you and cause lamps to fall from the ceiling.

Plus, being immune to fireballs, you have to jump on his head three times to move on.

During the second phase, jumping on him will be harder, since he's able to hover using the carrot power Up.

In the third, he gets his own fire flower, giving him projectiles you need to dodge.

After three final hits, the villain finally goes down.

King Boo uses a slot machine to determine what will happen, giving the fight a bit of uncertainty.

But what makes it challenging is knowing just how to hurt him, which is very unclear.

Depending on what the slot machine lands on, King Boo will either send out coins bubbles to refill fludd enemies, or fruit.

When he produces the latter, you're meant to toss a pepper in his mouth, setting his tongue on fire.

You might think that's dealing damage, but it's just that first step.

You then have to throw a different fruit in his mouth, which is what actually damages him.

Do this three times and the boss goes down.

But there were many of us who got stuck here because we had no clue what we were meant to do.

The boomsday machine is a fair bit harder than the Mega Hammer.

While he sits atop his tower, Mario must ascend using the cloud power up and ground pound the glass that protects him.

This grows harder after two hits when the lower part of the mech is revealed, turning the tower into a tank that moves around.

However, this is another fight that earns recognition for having a Daredevil Comet version.

Just like with Mega Hammer, that means Mario goes down in one hit, avoiding all of the Boomsday machine's attacks while trying to climb higher.

Knowing that one hit spells doom can be nerve wracking.

One of the most surprising moments in Super Mario Odyssey is when Mario has to fight a dragon far less cartoony looking than anything else he's ever faced.

The ruined dragon's electric attacks consists of wheels that roll across the arena and shockwaves Mario must jump over.

After the latter, you have to use Cappy to remove its crown and ground pound the weak spot on its head.

With every hit, its electrical attacks grow in number and ferocity.

The fight probably won't kill you, but the dragon's rematch in Princess Peach's castle is obviously harder.

Here, the dragon's shockwaves zigzag in height and the ground is covered in ice, making everything harder to dodge.

Naturally, Mario's arch nemesis takes up a few spots on our list.

The end of this Wii adventure starts by paying homage to the classic battles with the bridge destroying switch just behind Bowser.

But then Kamek works their magic and enlarges him to ridiculous size.

You then have to flee not only from Bowser, but the massive fireballs he consistently shoots your way.

Players must dodge them, letting the blast destroy obstacles in their path.

One wrong step and you'll get burned to a crisp, fall into a pit, or plunge into lava.

Playing by yourself is manageable, but the difficulty increases with every other player.

If there's four of you, you'll find your patience quickly dwindling.

Like the original Dino Piranha, Mario has to attack this boss's bulb like tail to deal damage.

Unfortunately, that's made a lot more difficult by the fact that it constantly sets itself on fire.

You have to time your attack just right, but each one brings a new level of annoyance.

It will eventually start moving faster with your window of attack shortening.

It will also shoot fireballs, giving you less room to work with on the already Tiny Planet.

The fight is certainly stressful, but it's worse in the sequel There.

It appears as the last fight in a boss Rush level, and

chances are you won't have much time left on the clock by the time you make it there.

Has shown a fondness towards using giant mechs in fights, though none of them have been as tough as Mecha Bowser.

The entire encounter is fought on a roller coaster, which sounds pretty cool in concept.