The Legend can be ZYGARDE since the MC would first get Xerneas and Yveltal and try to get Zygarde to come out but Zygarde would sense all the legendary Pokémon on the ship being a bigger potential threat to the environment so would go there and wait for the MC to see if he is strong enough to keep the legendaria's under control and not start an apocalypses with all the powers clashing. The chase part can use its snake form that could be made to look like a lamia (snake girl) and the battle form can be a big gundum girl. This legendary would fit perfectly since would go to extreme lengths as the environments guardian and sees the collection of legendries as a potential threat that cant be ignored. Also since gen 6 only has six legendries but gen 7 has a whooping 27 this character could act as a gate keeper keeping the MC from "frolicking in the field of untouched flowers" by showing up on the ship completely blocking the MC from going any further. Plus would be appropriate since having potentially 27 more legindaries get on the boat would be definitely something Zygarde would think cause and apocalypses if the MC is not strong enough to satisfy ALL the girls. Since gen 6 is smaller this would put excitement into this generation and would be in line with Zygarde's character and also since she is a mandatory legendary being that would need to be caught anyway as the main story goes forward. The dialogue could still be used but changed to include "I see you have those two troublesome headaches but can you keep them under control" this is where my previous lines of testing the MC can then be put in. Please tell me what you think because I really think this can work well and being GEN 6 allows lots of time to fine tune this for the future instalment if this is chosen by Brpdchainsaw. I'm not completely sure where zygarde's dog form could be used maybe for the sex part? Plus zygarde power is just below Arceus and would be an epic battle since she would take the MC seriously like the whole planets is at stake and hold nothing back to the point she would try to kill him like each Pokémon has when they battle but will love him after.
Zygarde? I'm still not sure about getting a Legend to invade the ship but having her come after the MC for potentially causing an apocalypse could be fun!
Her alternate forms can certainly be used, although I said before that I'll be mainly keeping those for side-scenes.
And you are right, Gen 6 is going to be pretty empty, I do have one thing planned to pad it out a little but it's not much yet
Zygarde would not go on the ship since she would see it as the territory of all the legendries and taking one step on it would have all the Pokémon gang up and most certainly beat her. She would see the MC as the source of the potential apocalypses but also could prevent a other apocalypses down the road so she would test him. The chase could start outside the ship at the harbor and go though shipping containers and cranes but it starts right outside the ship that the legends that could be on the ship to watch and be like a cheer squad since the other legends that could be caught always stay on the boat and his current legends would be released to protect the boat and populated areas without needing to mention what they do.
Another idea for the hatched Pokémon could be a image but they are in a chibi like baby form that would look adorable if it can be put in when they first hatch.
plus zygarde would be similar to Rayquaza for babysitting two legendaria's from fighting and now the MC has brought over an even bigger migraine that it will not allow. The persinality of zygarde does fit to what would be needed for a legendary to come out of the wild and be in a more potentially populated location This could show how much zygarde puts importance to the environment since it is the source of her power and would hold back. By having it in a Populated area she would not hold back if the threat is great enough. After the battle the town or city could hold a festival to thank the MC with a special festival (optional).
I did have an idea that could foreshadow one of the legendary of Gen 8 and would connect this to it well "A day of darkness is coming again and you may be able to prevent the destruction it will bring" I did read zygarde was at the first day of darkness so she saw the destruction there. I do have more ideas for this but dont want to go to far if this is to big or complex to be even included or see what Brpdchainsaw thinks first if they may be interested to hear more or not.
Thank you for hearing my idea!
