Rules & Basics

Here are the rules in brief if you haven't played

• You can play one character a turn
• You can have a maximum of 3 of your own characters in the ring at a time.
  
• There is no cost to playing a character, but there may be conditions to playing them (put your cursor over the text on the card to read more about the card. There may be stuff that happens when it comes into play, like that you have to K.O. a character, etc).
• You can play one backup on a character a turn. A backup increases a characters BP by 300 and is then discarded.
  
• Each player can attack once in their turn, characters may attack singularly (by themselves) or in a unified attack (which is more powerful, as the damage is carried over to the opponent if the blocker has a lesser BP).
• You may block an opponents attack with one character per attack, and per unified attack.

Here are some rules screenshots from the NGPC version:






Download the complete rules from here
or read an overview from StrategyWiki or GameFAQs