Tower Bosses

Each region has a tower, and within that tower resides the leader of the organization that rules the area.
These leaders usually regard Pal Tamers from outside the island as enemies, and will challenge you immediately if you enter the tower.
Tower boss battles have a time limit. If you can't defeat the enemy within the given time, you lose.
You can attempt tower boss battles as many times as you like, provided no one else is currently doing so.