Billy Soon

Billy Soon is the leader of a gang of San Francisco. They capture the three friends during the game. Luckily Kit was able to escape along with Chi and Michelle. Soon and Kit battled each other with Kit winning. Soon then pulled out a gun and shot at Michelle but Chi saved her by pushing her out of the way, unfortunately he was killed. Kit was enraged, he kicked the gun out of Soon's hand and killed him by crushing his ribs.

Console Strategy
For the entire boss battle, Billy will be using his scythe to try and slash at Kit. You can either block and attack him with your bare hands or you can break some of the crates and collect two nightsticks to defeat him. Be careful that his slashing can sometimes drain all of your block meter, resulting a big loss of health. When he does do a rapid slash combo, it is best to avoid the attacks. Once Billy loses about a half of his health, a second scythe will be thrown in, and Billy will use both of them for attack. Overall, avoid his hack and slash and counterattack him when he is worn out. Once his health meter is empty, you've beaten the San Francisco levels.

Trivia

 * You cannot pick up the scythes that Billy drops after he loses all his health. When his health empties, a cutscene will play.
 * Throughout the boss fight, several thugs will watch you fight. They will not attack you and they are out of reach meaning you cannot fight them.