Top Ten Hardest Mega Man Zero Series Bosses

Let alone his almost impossible-to-dodge Tentei Laser attack (multiple laser beams), the area is limited, allowing insta-deaths. His attacks do massive damage, and the possibility of being dragged down to the abyss makes this fight a complete and utter nightmare.

Strangely, he is weak to Ice Element (which makes absolutely no sense), which may have been put as an extra handicap, as if the developers had recognized how insane this showdown is. I just lost count of how many attempts it took me. Considering that the first installment of the Zero series didn't allow backtracking, I fought him without Sub-Tanks, having to use those recovering life Cyber-Elves. The one and only time I used the Cyber-Elves in the whole series.

After four of the regular missions, you are obligated to deal with him. Without this knowledge, I went without a Sub-Tank, which makes this boss impossible, I'm-possible! There is no wall to slide and jump over him, and Craft has no elemental weakness!

I had to start over the game, get a Sub-Tank, and then fight him. Just one hell of a battle!

This is the real deal in terms of difficulty, utter madness, and unfairness! Every attack of this beast hits like a truck, and except for the spike attack, you will hardly ever succeed in dodging (I still don't know how to protect myself against the beam attack). You're likely to refill your energy with your sub-tanks every two attacks or so. It's ridiculous!

To sum up, he keeps guarding his only hit spot the whole fight. He just opens it when he is ready to launch an attack, so you have to attack and immediately be ready to evade. Oh, and I almost forgot: you have two minutes to kill him. Otherwise, you're dead! Recommended: at least two sub-tanks FILLED, which means finishing his first form in an almost perfect run!

If it wasn't for Copy X - Second Form's insta-death possibilities, this would be the hardest of the series!

Holy Lord! Never could I expect a regular boss so damn hard as this. With an undodgeable movement (when she separates herself into five dancing flames) and little window for attack, pray for her to use her rare spiral flame attack, which makes her extremely vulnerable.

The pinnacle moment of the series! Fighting the old Zero body from Mega Man X's series, provided with all his signature movements, was astonishing... but very hard!

To compensate for the fact that the final boss has three forms, the previous two forms of Omega are easy. So reaching this final form with the two Sub Tanks full is doable and required!

The hardest Guardian by far, in a fashion that he is fought at the very beginning of his level instead of at the end. His clone attack is painful, and the fact that he has no elemental weakness makes this a long fight.

His dashing attack with the katana and the giant shuriken, combined with his down-thrust blow, transform him into one of the coolest characters in the series.

The hardest guardian by far! In a fashion that he is fought at the beginning of the stage instead of at the end. This son-of-a-bitch has no elemental weakness, and the windows for attacking are scarce, which makes this battle very long.

The annoyance of his clone movement, his swiftness, and his dash and katana move are extremely hard to escape.

He is capable of using all the elements and can recover himself during the fight. Until I figured out the strategy of running from him, expecting his super punch attack to counter-attack, this battle was unthinkable to pass through.

His attacks do more damage than normal, but after some practice, you will be able to learn his pattern and evade his attacks. Still, the high amount of life taken after a silly mistake is a cruel punishment.

Invoking the attacks of the Weil's Numbers Bosses from Mega Man Zero 3 is a cool touch, which rekindles the feeling of a true sequence from the previous game.

This boss is all about patience and sticking to a strategy. He can only be hit at a given moment of his moveset, so charge your Z-Saber with the Thunder Chip and wait.

Despite his pathetic appearance, this guy is a pain in the ass. His M.O. is all about eating the little caterpillars to inflate himself, turning into a big ball that varies the stage (a movement that is excruciating to dodge).

But since he sometimes inflates out of nowhere (arbitrarily, without eating the caterpillars), the battle becomes very unfair. Also, he is hard to hit, can negate your Buster shots when standing still, and has no elemental damage.

The hugest regular boss of the series. He has some unfair attacks (when he separates his body, for example), and it's nearly impossible to attack him with ice (his elemental weakness).