When you start, make your way to the middle of Fortune Park (there is a Restroom and a Maintenence Room). It looks like an alleyway almost.

Position yourself right next to the Fountain/Pool thing. Then Chuck will speed towards you!

Just before he hits you, at the right moment jump out of the way (dodge by clicking the left analog stick).

He will be stuck against the wall and he is gonna reverse... That's when you hit him!

Take either a Katana, Spikebat, or Light Sword (gems and flashligt) and some food/drinks.
Repeat this 5 or 6 times and he should be dead by them. Then you get the key to his bike!