In Pokémon Ruby, my favorite moment was when I finally caught Groudon. I used to spend hours trying to catch this Pokémon, but it kept breaking free of the PokéBall. It used to drive me insane. xD In Emerald, my favorite moment is scene that features Groudon, Kyogre, and Rayquaza. Every time I watch it, I get goosebumps.