at the end of prince of persia: the sands of time where you fight the vizier? he was only slightly more powerful then a regular enemy, and a single regular enemy is pretty weak. probably the easiest boss fight ever. i was able to beat him on my second play through without taking any damage and i wasnt even trying to do that. sorry about the spoiler, but i dont know how to hide it and its kinda predictable anyway.
ganondorf in twilight princess. he spent most of the fight walking around. his actual attacks were pretty easy to block or dodge, and the cutscene where he dies i still hold up as the worst end game cutscene in the history of video games.
ganondorf in wind waker, better than twilight princess, but so very short. probably less than two minutes. and theres like no strategy except to use counter attacks.
perfect chaos from sonic adventure. i mean cmon, you win by running at him so fast his head explodes. i wish i was fucking kidding.
metal sonic from sonic heroes. i should have expected a bad fight, but again you spend most of the fight not even attacking.
the multiphase battle at the end of metroid prime: corruption. its a good enough battle, but it was too easy because you are stuck in hypermode. so instead of having a health meter an dying when you lose it all, your basically timed instead. but the timer counts so slowly that you get at least a half hour to fight it.
ganon in ocarina of time. that fight was ludicrously easy. and ganon was about a third of the size i expected him to be. and he didnt look scary at all. i mean i know the graphics were pretty limited back then but he looked almost cute for gods sake.
sonic adventure 2 was similar to the first: you just run straight at the boss, only now its even easier because you dont have to reach top speed. there was something else you need to do, maybe press one button.
super mario sunshine. you basically win by ass pounding different parts of the floor.
super mario galaxy. a bad ending to a great game, its a multi phase battle with all the phases being taken from other bosses. its like bowsers not even trying.