Your favourite boss battles

This thread sure does remind me how poor my memory is. I've played so many of these games, but I can't recall those specifics of the battles. I remember the areas they all happened in, yet certain details like the enemy moves and appearances have been lost to me. Also, wow, the memory I have left seemed to have glamorized things. I thought the UI in several of those older ones that I fondly remember was a bit... better.

 Spoiler

As for me, most of the Chrono Trigger bosses remain fondly in my memory. The robot on the bridge, Magus, the underground demon that destroyed the forest of the past, that tyrannosaur thing before lavos's initial visit; and of course lavos himself.

Asides from those, I honestly don't have a favorite, but I'll try and pull up some vids that I hope not to be too common (You know, like Giygas).
Terrenigma

 Optional

[video=youtube;Gh9tcDgorl8]http://www.youtube.com/watch?v=Gh9tcDgorl8[/video]

DK64

 Final Boss

[video=youtube;DurkQDR-lks]http://www.youtube.com/watch?v=DurkQDR-lks&feature=related[/video]
[video=youtube;wxXW_Ei6rTg]http://www.youtube.com/watch?v=wxXW_Ei6rTg&NR=1[/video]
[video=youtube;wQmu34tESW4]http://www.youtube.com/watch?v=wQmu34tESW4&feature=related[/video]

 Only Rare could make a racing game have a somewhat memorable boss

[video=youtube;Ioec8inQogE]http://www.youtube.com/watch?v=Ioec8inQogE[/video]
Although I might just remember it for having to redo it several times.

Hmm... Just realized a lot of the bosses I had in mind were a lot less impressive than I had remembered. Also, it's 5 AM so I'm stopping for now.