First of all, chill out on the question marks and exclamation points.
He is the Green Goblin.
You chase him through the streets first and he will stop occassionally and throw fire balls at you. Eventually he will stop and the fight will begin.
He will throw fireballs at you, one at a time, easily dodged. If you get too close, he’ll either punch your or back slap you. Soon, he will roar, and fire two fireballs in quick succession. Doing so would make burnt out, take this time to whack at
him. When he’s on fire again, run. He will also leap at you, so prepare to do a
lot of double jumping. After a while, he will grab you by your leg than slam you
into a room. In there, he won’t throw as many fireballs, but instead start
jumping around. After three consecutive jumps, he will jump really high, than
slam down. When he does so, leap as far as possible, as he creates a ring of
fire. Once he’s done that, he will be tired again. Go in and smack him, then run
before he’s on fire again. If you’re too close, he’ll either grab and throw you,
which does no damage, or get you in a bear hug, leap to the top, toss you to the ground and slam you with his feet.