A Gathering is a meeting of all four Kingdoms, held in peace during Full-Moon. The royal that takes the '-star' name chooses the warriors and apprentices who will go.
During Gatherings, Moon Kingdom will voice their displeasure by surrounding the island in mist if a fight has broken out. When this happens, the Gathering is finished.
The Gathering is a time where the Royals will announce new warriors, new apprentices and the birth or death of a cat.
The Gathering is held at the Gathering island, which is connected to all four Kingdoms. On the island is a tall rock where the Royals who are mates of the '-star' Royal, and there's a tree where all the '-star' Royals sit. Each Kingdom is connected to the Gathering island by the stepping stones. They use these stones to get to the Gathering.