If you're talking about the guy who has hooves and horns that can cast spells with it's
horns, what you need to do is you need to get on it's back and start attacking it's head.
After a while it will drop it's head and you'll fall off. He'll cast a spell and you just
need to run around to try to dodge the spell. Get right back up on his back and continue
attacking him until he dies.

Well i defeated him by gettin on his back by jumpin on hin back legs and onto his head.
Once i done this i was safe from what eva he done to goofy n donald. So all i would do is
let goofy and donald do it all and you would just cure them all the time. But i wanted to
do summit so while i was on his head i suppose i could fight him and this straagy really
helped me to finish the game soon after!! Hahaha! Oh yes and p. S i'm a girl...

If ur talking about the traverse world lord,his name is gaurd armor and u have to avoid as
many attacks as possible then attack as much as possibe. Make sure to have plenty of
potions.