Once you reach level 20, to play in ELO, you must have a valid Deck. A valid Deck follows these rules and select to play in ELO mode (the option is available in the page "My Deck" when all other conditions are fullfiled) :
- No doubles
- The characters DJ Korr, General, Kiki and Vickie are forbidden
- The sum of the levels of the characters must no be over 25.
When you begin in ELO, you will start with a value of 1000. Then, after each ELO battle, your value will go up or down based on the result of the battle and the ELO value of your opponent.