>>43099281It's pointless and doesn't really need to exist, but I think it's one of the coolest looking Legendaries. It's like an ancient artifact containing a sleeping superbeing inside of it.
>>43099803I get the feeling Cosmoem only exists to bridge the gap between Cosmog -> Solgaleo. Without it Solgaleo feels very out of place, while Lunala is easily believable as a Cosmog evo (Cosmog even has a vaguely bat-like shape).