Thank you
I do have some idea for the eternatus that the MC has his "master sword" pierce the depths of eternatus while the shield would be the positive emotions the legends are directing to the MC that would make him immune to etenatus drain field which would need both Zacian (sword) and Zamazenta (shield) to activate the power to get close the the dragon and deal with her. I could see that both Zacian and Zamazenta have lost there reason to defend the region thus the MC need to rekindle their "passion" to fight once more. I can see the MC would go into hyperdrive or feel like he has mega evolved to grow his "master sword" big enough to be felt by a 66 foot tall dragon and she would fall on top of him crushing him with her massive breasts but he would be fine since his shield would still protect him to crawl out give her a kiss on her massive lips. Zygarde would then sense as long as eternatus is with the MC the apocalypse would not happen and the opposite could happen that instead of destruction the would could get stronger. Plus her room on the ship would have a lot of plants in it since its the source of her power so a indoor park would be suitable for her comfort to live in a boat traveling at sea if her room was to be visited in future. I may have more ideas after the next part of your game has been released.