Reference article
Grand Tournament (Duck Life 8: Adventure)
Grand Tournament is one of Adventure’s three major tournaments.
Entering and progressing
Defeat the Duck City champion, return to the Grand Dojo and solve the route toward the Grand Tournament.
Tournament structure
Finish the race and battle branches to unlock the champion challenge. The champion must be beaten in both disciplines. Leaving a branch halfway through requires restarting that branch, as explained by the tournament introduction.
Champion
The champion is 
Marco. Train and choose equipment for both races and battles.
