no its the third one, the giant fish

Oh yes... He was hard.. I completely forgot about him... I still think fungi forest boss is harder but his "babies" made that battle hard as hell.

None of the OoT bosses were hard, except maybe that shadow temple one...

The worst one I can think of is that DK64 boss that you fight in a lake. It tuned the framerate down to like 15fps, making everything impossible.

I found Gyorg really easy, don't know why everyone says he is hard

But the hardest N64 boss for me is also a Majora's Mask boss, I don't know what it is called but it is the Great Bay Temple's Sub Boss with all the eyes, god I hated that thing

I remember Jaws from Goldeneye 007 being hard. Especially on 007 Mode.

Lanky's boss did that? I just beat it but the framerate never really dropped. The impossible boss for me was Chunky because you legit couldn't mess up on the final phase since its timed.

That's how I remember it, but it most likely wasn't as bad as 15fps. It seems like DK64 usually hovers around 25fps anyway.

Edit: Yay, 200 posts

The two mantis in Jet Force Gemini were kinda tricky.
And Mizar, the final boss was definitely a tough one (but that's what final bosses should be like).

Oh and final encounter with Canary Mary in Banjo-Tooie!!

yeah I actually like the challenge, but it seems to be a widespread thing because I think I read that they will tweak the fight for the upcoming remake

Altough not a boss, that canary was hell indeed. the game doesn't tell you that pressing the button fast = an auto loss. you have to find a medium speed  and only speed up a few meters before the finishing line, and even then she generally speeds up and wins. considering the course is really long, it's infuriating to start over.