Well, i usually choose the types that have the most resistances or fewest weaknesses so probably:

Dragon
Ghost
Steel

I said harry potter because bulbasaur is cooler.

All pseudo-legendaries except for metagross have a double weakness to a single type.
You are never able to catch every pokemon from a single generation, with only a single game pack.
No 3D pokemon game has ever taken place in a region that has been played in a 2d game.
There has been at least one psychic legendary pokemon and one flying legendary pokemon in every main game.
Mew is the only non-gendered pokemon who can learn attract; AND it effects other pokemon that do not have a gender.
Every main game since crystal has had a battle tower.

I have a lot of these.

Wow, the new region looks pretty big, though these pokemon are really starting to look even more absurd than generation IV.
I think I'll just wait for "Grey" version.

Signature Format
Text- Trainer Silver
Image- Giratina and Rayquaza
Backround- something darker, but really do what you want
Colors- Maximum black/silver or black/purple whatever looks better to you
Matching Avatar- not necessary

I looked through all the posts, and it seemed like there was still possibly room for me, i just wanted to see how something like this would look, since there doesnt seem to be anything like it on the web.

Blaziken, Scizor, Mismagius

But in-battle foavorites would be Scizor,Kingdra,Blaziken. In that order. In the party.

Hard rock and death metal pretty much.
Hatebreed, Dissection, Dethklok, that kind of stuff.