Which team lost in the third round then went on to reach the World Cup finals the same year?

That'd be team Ep1dem1c. They've lost to Team SK in the third round because SK tried to do stuff to team Ep1dem1c when they're playing. And so the stuff Team SK did was disturbing to Team Ep1dem1c and they got scared then Team Ep1dem1c lost the competition. but then later Ep1dem1c defeated the number one team in the world, the Complexity Syndicate, and went in to the WCG. World Cup Games.