Mighty Mega Evolution Pokemon Battle for Victory in the Pokemon Battle Arena Decks Mega Charizard X vs Mega Blastoise. Mega Evolution Pokemon are ready to heat up the battlefield in the new Pokemon TCG: Battle Arena Decks! These 60-card decks are ready to play right away, with powerful cards and winning strategies worthy of an ace Trainer. Each deck is led by an exceptional Mega Evolution Pokemon-EX and includes 11 foil cards. Let the battle begin!