Remix it and put your name on the evolution that you'd like to voice as, I couldn't do eevee because I was un able to draw it UnU, but not many people is gonna sign up for it anyway, so I don't think it'll be a problem. (By the way gender doesn't matter, if you're a boy who wants to be a femine pokemon such as sylveon then you can, if you're a girl who wants to be a masculine pokemon such as umbreon then thats also fine, just thought it was importent to announce this, but that's all.)
I'm pretty much making a fan-comic, so I'll give credits on what you did for the project (including voicing) , so I make the art. I would voice one but only if any is avaliable. (By the way the names on the eeveevultion are the people who alredy claimed it, and if you claim one I will ask you 2 questions.)
