3rd Gen You are only allowed one pokemon

Blaziken solos lol But other choices could be Absol, Gardeivor, maybe Walrein, Breloom.

Absol, it has one of the dumber designs but it can M-Evolve, and their pretty strong in general.

Hard to pick a Hoenn region Pokemon that hasn't been picked yet but I think Brock kind of made my decision for me: Ludicolo. Grass/Water Typing for the win.

Just to clarify, I was joking when I said Milotic was only for me! Seriously you guys can pick any Pokemon you want from Hoenn, it's okay if somebody else has it too. Just know that it is the only Pokemon that will be in your party.

Hoenn, huh! The region with Pokémon I like the least...
Hmm... I'll take Banette, I think.

Blaziken. The starter I love the most across all generations.

Trying to figure out a reason why I wouldn't just go with a Latias and call it a day.

Although Jirachi is also anothe tempting option... but I'll stick with the former.

SAMUROTT!!!!!! :P

*Cough*... I mean FLYGON!!!!

... just gimme a level 5 one and call it good! xD

Swampert. Sure it can't fly, but it does have access to all the Water-type HMs and for a fourth move slot Earthquake for super-powerful STAB. And when I don't need Dive anymore, I could just go to Lilycove and forget it for something else.

Flygon it is. It's available relatively late in the game compared to most of my other favourites, so it makes for an interesting change if I can get it as my starter.

Beautifly and Sableye are other options. I think Flygon is a more solid option all around though.

Hardest question to me, as Gen 3 is my favorite, and I love so many pokemon from it. I'd choose one of either (yes this is turning into a list but for the love of everything I can't decide):

-Absol: Not just my favorite pokemon of all time, ever, but also useful in that can predict disasters to keep me safe, it's beautiful and it carries a sweet little punch to its attacks.
-Swampert: Insane HM utility means I can go whereever I want, its typing means it can beat almost anyone it wants (screw Wallace's Ludicolo), and it's bulky.
-Metagross: Nobody said Birch can't have any of those. It levitates, helps me go anywhere, Steel typing is OP in Gen 3, shiny Metagross is beautiful, thing hits like a truck

Flygon. My favorite type is dragon, and until recently it was my favorite dragon type pokemon.

A 3rd Gen Pokémon that hasn't been picked yet? Hmm.. Runners-up would be Shiftry and Sharpedo but I'd finally go for Walrein.

Armaldo! It's such a cool looking fossil Pokémon.

Ill take an Altaria... it doubles as a pillow!

I know somebody mentioned it, but Zangoose. I love cats and it's strong.

One Pokemon only? Well, it would have to be a flying type.
My heart tells me it would be Tailow, since it's the highest leveled Pokemon in my Emerald run right now and I've grown fond of it.
Or Whismur. Whismur is hecka cute.

I'd pick Glalie but dunno if it's already taken or not.

altaria for me. it was a toss up between it and two other pokemon but let me fly on a fluffy cloud (especially when it's in mega)!

The mudskipper is mine
The dog gone mudskipper is mine

Yeah, I pick Marshtomp. He's sunshine to my eyes.