From the Super Mario Wiki
Opening Ceremony is the first area of the game Donkey Kong Jungle Beat. It is simply a small stretch of jungle that is seemingly owned by the Party Monkeys, as no other enemies appear in it. It mainly serves as a tutorial for Donkey Kong to help him learn his moves. At the end of the area, Donkey Kong must break a tree. Donkey Kong returns to Opening Ceremony for a victory celebration with the Helper Monkeys after defeating the Cactus King. If Donkey Kong defeats the Ghastly King, then Dread Kong, Karate Kong, Ninja Kong, a multitude of Ninjapes and Sumo Kong will appear at the victory celebration as well.