Groudon and Kyogre's epicbattle in Pokémon Emerald. And more importantly, Rayquaza, who flies to Sootopolis after you encounter it at the Sky Pillar. Once you arrive there and witness Groudon and Kyogre again, Rayquaza comes out, flies through the clouds, descends with a trail of green light cloaking it, and swoops down to Groudon and Kyogre. With one mighty roar, it sends them both away, and departs, returning the weather to normal. How intense is that?