Required Tools
Firefox or Chrome
Cheat Engine 5.6 or better
Steps

Open Cheat Engine.
Enter Jersey Shore [play now]
Select browser in process list (plugin-container.exe for Firefox users, 3rd Chrome.exe for Google Chrome users)

Go fight with someone of a higher level so you gain more exp and coins.

Scan current health
Fight, lose some health and NEXT scan new health
Only 1 or 2 address remain. Freeze both values and watch as nothing happens when you get hit. You will definitely win the fight now.

Note: To Set speedhack to fight faste. You can search for opponent health and change it to 0