Hardest Nintendo Bosses

One of the only times a Mario boss has been hard, was about to pick Bouldergeist, but realized one of the only reasons I was terrible against him was because I sucked at 3D Mario games, and I still kind of do.

She is a VERY, VERY HARD boss. My opinion of the hardest boss in Nintendo's history, maybe the hardest boss in VIDEO GAME history!

Great call for a difficulty spike!

Wow this was very hard - Mario123

While the battle is short, the amount of crap that happens in it is unbelievable. - SuperInkLink64

Took me 186 tries. This was horrendous.

Get this to the top three, minimum.

This is the hardest boss I’ve fought in the modern gaming era, besides the Hat in Time Death Wish bosses.

It took me FOREVER to figure out how to beat him. I hated having to go through the castle every time.

It is not that difficult - Retroman64

This boss is hard but it's not a Nintendo boss it's a Sega boss

Very difficult to pass on replay mode with 5 health! Dodging the back lasers and positioning to get the clockwork kazooie eggs in on time is difficult but worth it.

Not Nintendo, just sega

Even on the easiest difficulty I had a hard time with this guy

Beyond incredibly hard on Intense mode! Should be number 1! - Blubbydubber1

Almost impossible on Intense Mode

He wasn't even hard in my opinion.
You have like 7 characters to kill him. - Johnalove

NOT NINTENDO - SuperInkLink64

Why he's not on this list? He is hard as hell! You need to get in the water to hit him and if you don't escape from the water quickly, you lose like three hearts!

Awesome but really annoying and ugly

This boss is hard but definitely not the hardest boss in the kirby series. - KirbyZelda

VERY VERY VERY HARD! WHEN I BEAT HIM I HUGGED MYSELF FOR 10 MINUTES!

Diamond Dog is the final Sanctuary boss of Earthbound (or Mother 2 as it is known in Japan)

This guy took me 30 tries to beat.
First of all, his amount of HP is HUGE. You can barely see the health meter drop every time you hit him.
Secondly, he will constantly give you annoying debuffs.
And lastly, every once in a while, he will unleash an unavoidable attack killing everyone on your team except for your tank, or perhaps maybe someone with a defense buff.