* a Pokemon - what kind, what type, etc.
This is a tough question. I could be a Mew (I love it, so cute and playful and it's a cat), a Charmander, Eevee, Jigglypuff, or a Torchic. If I'm going for similarities in personality, then probably an Abra or a Smeargle. The Abra would be because (currently) I'm sleeping a lot but when I'm awake I do a lot of work. The Smeargle would be because I love to draw (but I can't paint to save my butt).
* Gym Leader - what would be your team, your type, and your gym layout, etc.
If I was a Gym Leader, I would be a Normal type leader as a nod to the gym in Second Gen. I don't know right now what team I would have, but I'd a full team with a Jigglypuff and a Chansey. Not sure what the others would be.
There are two possibilities for my Gym. The first would be a sort of maze with the lights turned off so the visitor would be forced to walk around blindly and hit against the wall for my amusement. There would be one true path, meaning that there would be no way for them to face me without any other fights.
The second would be that the Gym would be a nod to Sabrina's. There would be same-size rooms all over with four teleporters in each. However, unlike her gym, the the teleporters would be set up against the walls (not the corners) and every room would have a Trainer.
I know neither idea has anything to do with Normal types, but it'd be fun to mess with visitors' heads.
* Champion/Elite 4 Member - what would be your team/type, etc?
Uh... I'd probably decide to mess with the player's heads and have a team consisting of Psychic, Ghost, Dark, and Fire types.
* A Ranger - what would be your partner Pokemon?
I don't know, a Ditto? Raichu? Meowth? Team Rocket's Meowth just for laughs?
* A Trainer - what would you raise, how do you raise your pokemon, etc.
Anything I catch except Zubats and Bidoof. Those guys can go jump into a volcano for all I care. I would raise them to the best of my ability, attempting to balance Training with just simply playing with them. There might be a couple I'd tend to specifically for Contests, but I'd tend to them in the same loving manner.
* If you had any Pokemon Ability
Teleport. Oh, wait, ability. Own Tempo, Cute Charm, or Oblivious.
* If your pet was a Pokemon, what would it be?
Since we'd be in the house with all my books and electronics, a lot of Types would be out of the question due to potential damage to my stuff (let alone myself or my home). The types I would consider then would be Normal, Psychic, Ghost, Flying, and Dark.
More specifically, I'd probably have a Gastly, Clefairy (if I managed to get one), Jigglypuff, Persian (evolved from Meowth), blah blah or blah... You get the picture.
* And pretty much anything else. :c
I would reconstruct the Ruins of Alph and let Unown run free inside.
That, or Pokemon Mansion (complete with copies of the Mewtwo Journals).