I've already started on a sign up, with an Arcanine as a partner pokemon, I didn't realise it was counted as psuedo-legendary. I saw in the first post that if a sign up is impressive enough I can have a legendary partner, I don't quite think my post would be impressive enough for this. Would it be okay for me to post two versions of my sign up? One with an Arcanine and one with a Rapidash or a Zebstrika or something? So that if the Arcanine sign up isn't good enough, I've already got the back=up. I could keep the character's appearance, history and personality the same. I would just need to alter the pokemon sign up and weapon/armour, which wouldn't be too much work.
I'm planning on having a sort of cavalry character, mounted combat and whatnot. Arcanine seemed pretty good for that, I would have gone for Rapidash or Zebstrika but they both have stuff on their backs that looks like it would get in the way whilst riding. I'll have a look through other pokemon that look mountable.
Since I'm already working on a post, reserve please!
EDIT: Sawsbuck could work pretty well as a back-up come to think of it, although it may be a bit small.