What if Solgaleo is weak to the fire type on purpose and Lunala is weak to the dark type on purpose? The description for Solgaleo is “the beast that devours the sun” and Luanda's states "With its wings spread to absorb the surrounding light..." Solgaleo may consume the sun to reduce fire type effects while Lunala calls the moon to bring light in order to lessen the effects of the dark type? What if Solgaleo is an antagonist to the sun while Lunala aids the moon? I think it would be an interesting concept to have two legendaries with opposite motives.