Well, if you want to think about it like that, Black is the only Dex holder whose hair resembles Ash's enough for Ash-Greninja design to work. X's hair is too straight.
But then again, Black's hair is brown, not black. (Dyeing is an option?)
As for the starter distribution, Y having Greninja fits perfectly. She's a Sky Trainer and can fly with her magic suit that doesn't actually follow the laws of how flying works. Greninja is a frog, which are known for their jumping skills.
Heck, the Pokemon website says that Ash-Greninja has increased leg strength. If Ash-Greninja does show up in Pokespe, they could reference that. They mentioned how good Croaky was at jumping when it was still a Froakie, so it'd be a nice call back.
And the depressed loner X having the super cheerful and friendly Marisso works as a nice contrast. I already pointed out why Malva having Delphox fits.
But then again, Black's hair is brown, not black. (Dyeing is an option?)
As for the starter distribution, Y having Greninja fits perfectly. She's a Sky Trainer and can fly with her magic suit that doesn't actually follow the laws of how flying works. Greninja is a frog, which are known for their jumping skills.
Heck, the Pokemon website says that Ash-Greninja has increased leg strength. If Ash-Greninja does show up in Pokespe, they could reference that. They mentioned how good Croaky was at jumping when it was still a Froakie, so it'd be a nice call back.
And the depressed loner X having the super cheerful and friendly Marisso works as a nice contrast. I already pointed out why Malva having Delphox fits.