Digimon Digital Card Battles are three round strategy match ups using 30-card decks based on creatures with unique attack powers, special effects, counterattacks, armor, and the ability to increase to stronger levels through 'digivolution' using special option cards or creature fusion. Three Digimon card levels, rookie (R), champion (C) and ultimate (U) (mega Digimon), can be 'digivolved' to create more powerful creatures. Partner Cards, selected at the beginning of each game, can get armor, gain experience points, and power up with the use of Digi-Parts as you advance through battles.