Rain boost the damage water moves do so the extra damage may be enough to make up for Kyogre resistance Sunlight weakens the damage water moves do so water attacks are basically useless agents Groudon despite the type advantage
@@hoaujudaiyubel even if rain boosted water power, it’s still silly to use a move that the opponent resists And the water attack would be half power at sunlight, but Groudon is 2x against water. Sunlight + ground type = Groudon takes 1x damage to water. That is not useless. Do the math.