I had trouble with that, too.Bowser (3rd time) in Paper Mario for the N64.
I still haven't beaten him.
CURSE YOU, 30-HEART! CURSE YOOOOUUUUUUU!!!!!!
Forgot to mention the Master Hands in Super Smash Bros. Melee. I still haven't beaten Master Hand on Hard or Very Hard, and don't ever bother asking about the round where you have to fight the left Hand too!
His down B special is the same as a baseball bat swing, if you can get the timing down then you can **** up anyone.
I remember having the hardest time beating Doc Ock in Spidey 2. He was just ridicoulosly mean to me.