Fireheart was mad now. Although not normally a sore loser, he was getting angry.
Fireheart jumped on top of Bluestar, with Tigerclaw by his side. He brought out his most favored card- his Mega Charizard EX. Next he took out his Lycanroc , and shoved Bluestar up, letting her pick her cards. She chose the best ones she had, the Vaporeon she got from Riverclan for giving up her kits, and the one she gets for being leader- the Jolteon big card.
With Fireheart's years of experience in pokemon, he won the game. This may be why Bluestar accepted him into her clan- or not.