Lunala is a powerful Pokemon, but no creature can hope to defeat Bass. Bass is the strongest being in all of media and his abilities have no limit. There isn’t even a way for Lunala to hope to injure Bass. Bass just exists on a higher plane than all other characters. He can’t be defeated, I’ve come to accept this over the years. Lunala is just the latest in a long line of opponents who could not defeat him. Bass wins.