The system first looks at your range of supporters, your average success rate in Head Ball 2 and your level to find a suitable opponent. As a result of these parameters, the most appropriate opponent pairs with you.
For example, if you have more supporters, you are more likely to match an opponent who is stronger but has the same level as you. Playing the game better than other players on your level, success will increase your environment, you can still encounter strong opponents.
By challenging stronger opponents, you can beat them by using more powerful characters and accessories.